СПИСОК патентов США - подгруппа МПК16 H04Q1/30
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| № п/п | Номер патента | Название патента | |||
2017 | |||||
| 1 | 9608680 | Messaging devices and methods | |||
| 2 | 9576445 | Systems and methods for generating haptic effects associated with an envelope in audio signals | |||
| 3 | 9569957 | Systems, devices and methods involving device identification | |||
| 4 | 9569648 | Apparatus and methods for wireless communication using load modulation | |||
| 5 | 9565026 | System and method for providing location based services using collaborative networks | |||
| 6 | 9553992 | Automated emergency notification system | |||
2016 | |||||
| 7 | 9497704 | Method for scheduling wake/sleep cycles by a central device in a wireless network | |||
| 8 | 9443402 | Vibratory alert device | |||
| 9 | 9342967 | Motion activated off grid LED light | |||
| 10 | 9247620 | Controlling light source(s) via a portable device | |||
2015 | |||||
| 11 | 9226365 | Lighting system | |||
| 12 | 9215556 | System and method for determining the location of wireless sensors | |||
| 13 | 9214094 | Methods and apparatuses for emergency notifications to the hearing impaired | |||
| 14 | 9210365 | Methods, computer program products, and systems for providing automated video tracking via a radio frequency identification | |||
| 15 | 9209988 | Hardware-based beacon processing | |||
| 16 | 9209628 | Systems and methods for de-energizing battery packs | |||
| 17 | 9180819 | Interior rearview mirror assembly with integrated indicator symbol | |||
| 18 | 9177243 | Passive RFID transponder with powered element | |||
| 19 | 9176494 | System and method of communication for electronic apparatuses | |||
| 20 | 9155221 | Digital subscriber line access multiplexer enclosures having onboard power | |||
| 21 | 9112957 | Adapting portable electrical devices to receive power wirelessly | |||
| 22 | 9112707 | System and method for providing location based services using collaborative networks | |||
| 23 | 9112579 | Switching VSAT transmitter with smart stand-by mode | |||
| 24 | 9111427 | Chamber condition | |||
| 25 | 9104927 | Using a RFID paging infrastructure | |||
| 26 | 9087038 | Messaging with shortcut character strings | |||
| 27 | 9082026 | Wireless tag communication device, information processing apparatus, and recording medium | |||
| 28 | 9078152 | Programmable communicator | |||
| 29 | 9070062 | Streamlined apparatus and methods for RFID communication | |||
| 30 | 9041531 | Identifying the presence of an individual near medical radiation emitting equipment | |||
| 31 | 9030321 | Cargo theft prevention using text messaging | |||
| 32 | 9024748 | PASS-Tracker: apparatus and method for identifying and locating distressed firefighters | |||
| 33 | 9007212 | Using a RFID paging infrastructure | |||
| 34 | 9002264 | Antenna structure for a near-field communication device | |||
| 35 | 8965299 | Method and system for the processing control of multiple radio frequency communication streams by an integrated circuit card | |||
| 36 | 8955022 | Securing property | |||
| 37 | 8933786 | RFID tag device and method of recognizing the same | |||
2014 | |||||
| 38 | 8922338 | Power management in an electromagnetic transponder | |||
| 39 | 8890680 | Alternative billing modes for security and automation applications | |||
| 40 | 8890656 | Mobile panic button for health monitoring system | |||
| 41 | 8886759 | System and method for interactive marketing | |||
| 42 | 8872625 | Bridge between security system and appliances | |||
| 43 | 8872624 | Programmable communicator | |||
| 44 | 8866589 | Programmable communicator | |||
| 45 | 8847764 | RFID system with distributed read structure | |||
| 46 | 8847751 | Line status detection apparatus, communication apparatus, and line status detection method | |||
| 47 | 8841989 | Messaging devices and methods | |||
| 48 | 8836479 | Alerting system using distributed notification delivery | |||
| 49 | 8830033 | Active EMI shielding for protection of medical instruments | |||
| 50 | 8816855 | Methods, computer program products, and systems for providing automated video tracking via radio frequency identification | |||
| 51 | 8812007 | Control method of wireless irrigation | |||
| 52 | 8810408 | Medication management and reporting technology | |||
| 53 | 8792852 | Method for informing multiple mobile terminals of an emergency event | |||
| 54 | 8774863 | Apparatus and method for controlling built-in microphone of portable terminal | |||
| 55 | 8749349 | Method apparatus and computer program | |||
| 56 | 8749348 | Sensor device with persistent low power beacon | |||
| 57 | 8742893 | Filtered in-box for voice mail, e-mail, pages, web-based information, and faxes | |||
| 58 | 8723667 | System, device and method for managing a power distribution network | |||
| 59 | 8704654 | Circuit for communication over DC power line using high temperature electronics | |||
| 60 | 8686833 | Control system including electronic control apparatus and sensor apparatuses bus-connected to electronic control apparatus | |||
| 61 | 8659392 | System and method for determining the location of wireless sensors | |||
| 62 | 8653943 | Radio frequency identification system provided for access control | |||
| 63 | 8648717 | Programmable communicator | |||
| 64 | 8648712 | Electronic emergency messaging system | |||
| 65 | 8633802 | Programmable communicator | |||
| 66 | 8629758 | System and method for transmitting messages received from a paging network on a paging device to electronic devices | |||
2013 | |||||
| 67 | 8620312 | Combined background and 20/40 coexistence scan | |||
| 68 | 8618957 | Power management system and method for vehicle locating unit | |||
| 69 | 8577395 | Apparatus, and associated method, for paging a mobile station utilizing an enhanced mobile-terminated connection setup | |||
| 70 | 8564453 | Indicating errors in connection with devices | |||
| 71 | 8564407 | Universal infrared receiving apparatus and associated method | |||
| 72 | 8564406 | Pager with a touch-sensitive display screen and method for transmitting a message therefrom | |||
| 73 | 8560024 | Adapting portable electrical devices to receive power wirelessly | |||
| 74 | 8554386 | System and method for self-powered communications networks | |||
| 75 | 8552853 | Networked power and communication receptacle devices | |||
| 76 | 8543251 | Centralized fine grade control of device energy consumption | |||
| 77 | 8542111 | Programmable communicator | |||
| 78 | 8536998 | Integrated adaptive wireless mesh sensor platform and energy visualization and management system | |||
| 79 | 8531286 | System and method for monitoring security at a premises using line card with secondary communications channel | |||
| 80 | 8527018 | Method and apparatus for reducing power consumption in mobile terminal | |||
| 81 | 8525664 | System and method for minimizing the amount of data being sent on a network for supervised security systems | |||
| 82 | 8519843 | Power distribution device communications platform | |||
| 83 | 8508330 | Adaptive filter for lighting assembly control signals | |||
| 84 | 8503659 | Method and apparatus for ringback tone replacement with downloaded audio files | |||
| 85 | 8466789 | Method for theft recognition on a photovoltaic unit and inverter for a photovoltaic unit | |||
| 86 | 8451091 | Control system, electronic control unit, and communication method | |||
| 87 | 8421614 | Reliable redundant data communication through alternating current power distribution system | |||
| 88 | 8384518 | Illuminable latch | |||
| 89 | 8378809 | Network with switching control unit for disconnecting terminals from network voltage | |||
| 90 | 8374729 | Smart electrical outlets and associated networks | |||
| 91 | 8373557 | Method for establishing a telecommunications network for patient monitoring | |||
| 92 | 8368527 | Electronic device controlling system and control signal transmitting device | |||
| 93 | 8362899 | Initiating emergency communication in response to detecting bio-feedback satisfying an alert condition | |||
| 94 | 8354918 | Light, sound, and motion receiver devices | |||
| 95 | 8350671 | Method and apparatus for controlling new message alert in portable wireless terminal | |||
| 96 | 8344852 | Method and system for transmitting a plurality of notifications in a notification pool | |||
2012 | |||||
| 97 | 8299897 | Information processing apparatus, method, and program | |||
| 98 | 8285345 | Mobile terminal and method for switching states thereof | |||
| 99 | 8280453 | Adapting portable electrical devices to receive power wirelessly | |||
| 100 | 8264344 | Remote surveillance and intervention using wireless phone | |||
| 101 | 8258923 | System and method for locating objects and communicating with the same | |||
| 102 | 8238868 | Dynamic voltage scaling for packet-based data communication systems | |||
| 103 | 8208973 | System and method for variable beacon timing with wireless devices | |||
| 104 | 8203445 | Wireless lighting | |||
| 105 | 8194719 | Method and apparatus for maximizing standby time in remote stations configured to receive broadcast databurst messages | |||
| 106 | 8194550 | Trust-based methodology for securing vehicle-to-vehicle communications | |||
| 107 | 8193929 | Integrated adaptive wireless mesh sensor platform and energy visualization and management system | |||
| 108 | 8193908 | Pager with a touch-sensitive display screen and method for transmitting a message therefrom | |||
| 109 | 8188868 | Systems for activating and/or authenticating electronic devices for operation with apparel | |||
| 110 | 8183984 | Method and device for the power-saving operation of a plurality of RFID data carriers | |||
| 111 | 8180463 | Method and apparatus for a computerized integrated power bus | |||
| 112 | 8174379 | Networked power and communication receptacle devices | |||
| 113 | 8164421 | Adaptive remote verification of vehicular functions | |||
| 114 | 8149106 | Apparatus and method for data communication over power lines | |||
| 115 | 8145279 | Method of supporting operation of sleep mode in a wideband radio access system | |||
| 116 | 8138910 | Uninterruptible power supply unit | |||
| 117 | 8134450 | Content provision to subscribers via wireless transmission | |||
| 118 | 8098132 | Call receiving system and apparatus for selective reception of caller communication | |||
| 119 | 8094010 | Programmable communicator | |||
2011 | |||||
| 120 | 8081066 | Damage-resistant vibrator assemblies and wireless communications devices incorporating same | |||
| 121 | 8072323 | Power-line carrier communication apparatus | |||
| 122 | 8063768 | Modem apparatus | |||
| 123 | 8063766 | Emergency alert information based upon subscriber location | |||
| 124 | 8055310 | Adapting portable electrical devices to receive power wirelessly | |||
| 125 | 8044772 | Expert system assistance for persons in danger | |||
| 126 | 8040235 | Relay apparatus and electric appliance | |||
| 127 | 8036703 | Image capture reporting based on content-associated wireless identification | |||
| 128 | 8035507 | Method and apparatus for stimulating power line carrier injection with reactive oscillation | |||
| 129 | 8035481 | Illuminable latch | |||
| 130 | 8031049 | Method of communicating a command for load shedding of a load control system | |||
| 131 | 8018331 | Multilevel inverter using cascade configuration and control method thereof | |||
| 132 | 8014798 | High-capacity paging method, and associated apparatus, with further reduced probability of false page match | |||
| 133 | 7999668 | Series interlock system with integrated ability to identify breached locations | |||
| 134 | 7995998 | Wireless device with integrated emergency alert notification | |||
| 135 | 7994908 | Vehicle and information apparatus of vehicle | |||
| 136 | 7992026 | Controlling broadcast content processing using display state information | |||
| 137 | 7965992 | Method and system for broadcasting data messages to a vehicle | |||
| 138 | 7956723 | Digital communication system with security features | |||
| 139 | 7956722 | System and method for providing user-selected information to a paging-capable device | |||
| 140 | 7953012 | Monitoring arrangements, having communication establishment information changed from initial communication establishment information | |||
| 141 | 7925290 | System and method for efficiently providing high-performance dispatch services in a wireless system | |||
| 142 | 7915997 | System and method for remote activation with interleaved modulation protocol | |||
| 143 | 7913246 | System and method for updating a software program | |||
| 144 | 7907050 | Power supply communication system and method | |||
| 145 | 7904122 | Method of supporting operation of sleep mode in a wideband radio access system | |||
| 146 | 7903598 | Apparatus and method for downstream power management in a cable system | |||
| 147 | 7898406 | Powered device with priority indicator | |||
| 148 | 7880584 | Lockbox key with callback feature | |||
| 149 | 7876699 | Mobile station and method for verifying access points thereof | |||
2010 | |||||
| 150 | 7843314 | Paging transceivers and methods for selectively retrieving messages | |||
| 151 | 7822059 | Managing contention-free time allocations in a network | |||
| 152 | 7812717 | Situational network | |||
| 153 | 7800491 | Power-line carrier communication apparatus | |||
| 154 | 7796025 | Power line communication device and method | |||
| 155 | 7791468 | Power line communication system having time server | |||
| 156 | 7769415 | System and method for activating a communication device based on usage information | |||
| 157 | 7768390 | Method for transmitting sensor data in sensor network including pair node | |||
| 158 | 7768389 | Wireless user input device providing host link indication | |||
| 159 | 7767893 | Method of operating one or more individual entertainment display devices supported by spectators at a spectator event and an individual entertainment display device therefor | |||
| 160 | 7760072 | System and method for providing user-selected information to a paging-capable device | |||
| 161 | 7737838 | Method and apparatus for transmission of wireless signals in a mobile platform | |||
| 162 | 7728712 | Digital communication system with security features | |||
| 163 | 7701342 | Navigation system using RFID tags and method | |||
| 164 | 7688195 | Bridge system for installing electronic appliance to light source socket and bridge method thereof | |||
| 165 | 7683777 | Method and system for audio distribution in installations where the use of existing wiring is preferred | |||
| 166 | 7656289 | Apparatus for monitoring an inside of a manhole | |||
| 167 | 7652568 | Tracking of containers | |||
| 168 | 7648077 | HVAC communication system | |||
| 169 | 7643788 | Method and system for broadcasting data messages to a vehicle | |||
2009 | |||||
| 170 | 7626497 | Power line communication vegetation management system and method | |||
| 171 | 7626493 | Methods, systems, and products for interfacing with powerline networks | |||
| 172 | 7617343 | Scalable bus structure | |||
| 173 | 7562177 | Signal protocol assembly | |||
| 174 | 7551076 | Object locator feature as part of a security system | |||
| 175 | 7551074 | Method and arrangement for monitoring a transmission medium | |||
| 176 | 7535350 | Broadcast receiver receiving emergency alert signal and method of processing the emergency alert signal | |||
| 177 | 7529644 | Method of diagnosing an operations systems | |||
| 178 | 7518999 | Monitoring arrangements, having communication establishment information changed from initial communication establishment information | |||
| 179 | 7518486 | Method for locking an electrical device to a given locale | |||
| 180 | 7515699 | Call handling using non-speech cues via a personal assistant | |||
| 181 | 7511603 | Filtered in-box for voice mail, e-mail, pages, web-based information, and faxes | |||
| 182 | 7501953 | RFID readers transmitting preambles denoting communication parameters and RFID tags interpreting the same and methods | |||
| 183 | 7479624 | Laser light actuation system | |||
| 184 | 7477887 | Tag reader maintaining sensitivity with adjustable tag interrogation power level | |||
| 185 | 7474887 | Method and system for reducing battery consumption in wireless transmit/receive units (WTRUs) employed in a wireless local area network/wireless wide area network (WLAN/WWAN) | |||
2008 | |||||
| 186 | 7466225 | Power line communication system and method of operating the same | |||
| 187 | 7460934 | Power line communication system | |||
| 188 | 7450001 | Power line communications system and method | |||
| 189 | 7397345 | Method and vehicle for sending electronic advertisements | |||
| 190 | 7382227 | Portable computer supporting paging instructions | |||
| 191 | 7352282 | Communication system | |||
| 192 | 7350060 | Method and apparatus for sending thread-execution-state-sensitive supervisory commands to a simultaneous multi-threaded (SMT) processor | |||
| 193 | 7319384 | Communication apparatus and communication method | |||
2007 | |||||
| 194 | 7308269 | Push content filtering for short range communication | |||
| 195 | 7307519 | Communication system and PLC network | |||
| 196 | 7266591 | Providing content delivery during a call hold condition | |||
| 197 | 7265664 | Power line communications system and method | |||
| 198 | 7262694 | Multifunctional, intelligent power and communication device | |||
| 199 | 7259666 | Method and system for displaying status indications from communications network | |||
| 200 | 7243149 | System and method for determining a presence state of a user | |||
| 201 | 7242308 | Bed status information system for hospital beds | |||
| 202 | 7227462 | Extremely fast polling method for determining the presence of individual electric meters on a power line | |||
| 203 | 7218242 | Communication system and method including communication channel mobility | |||
| 204 | 7203463 | Power efficient channel scheduling in a wireless network | |||
| 205 | 7183898 | Coupling wireless portable communications device to a base station by a second network when out of communication with a first network | |||
| 206 | 7180427 | Information system | |||
| 207 | 7167079 | Method of setting the output power of a pager to aid in the installation of a wireless system | |||
| 208 | 7158010 | Circuit arrangement and method for phase modulation in a backscattering transponder | |||
2006 | |||||
| 209 | 7088232 | System and method for reducing radiation when distributing broadband communication signals over power lines | |||
| 210 | 7053753 | Wireless community alerting system | |||
| 211 | 7047049 | Radio communications device including at least one light source | |||
| 212 | 7015808 | Method and system for remote monitoring of processing status in computer-aided detection systems | |||
| 213 | 7005963 | Call receiving method and apparatus having two-way text messaging and automatic retrieval of call numbers making calls to apparatus | |||
2005 | |||||
| 214 | 6952751 | Method and apparatus for extending legacy computer systems | |||
| 215 | 6925174 | Interaction between echo canceller and packet voice processing | |||
| 216 | 6917280 | Cradle for accepting portable communications device and coupling portable communications device to first network by way of second network | |||
| 217 | 6900726 | System and method for fiber optic communication with safety-related alarm systems | |||
| 218 | 6900720 | Vending machines with field-programmable locks | |||
| 219 | 6888925 | Method for testing large-scale audio conference servers | |||
| 220 | 6882716 | Local control of call features in a telephone system | |||
| 221 | 6879819 | Control and messaging during emergency calls | |||
| 222 | 6868142 | Voice-operated interface for DTMF-controlled systems | |||
| 223 | 6868116 | Universal telephony tones detector | |||
| 224 | 6850616 | Frequency error detection methods and systems using the same | |||
| 225 | 6847608 | Path management and test method for switching system | |||
| 226 | 6839412 | Audio file transmission method | |||
2004 | |||||
| 227 | 6813529 | Method and apparatus for signal frequency decoding without an analog bandpass filter | |||
| 228 | 6801622 | Devices, software and methods for passing DTMF signals under voice compression | |||
| 229 | 6795533 | Intermediate voice and DTMF detector device for improved speech recognition utilization and penetration | |||
| 230 | 6792093 | System and method for telephone call recording and recorded call retrieval | |||
| 231 | 6782095 | Method and apparatus for performing spectral processing in tone detection | |||
| 232 | 6778641 | Telephone independent provision of speech recognition during dial tone and subsequent call progress states | |||
| 233 | 6771641 | DTMF digit collection and transportation for a packet network | |||
| 234 | 6765996 | Audio file transmission method | |||
| 235 | 6748059 | Apparatus and method for unified tone detection | |||
| 236 | 6728369 | Method and device for distinguishing among a plurality of devices and data elements with a sequence of signals | |||
| 237 | 6711540 | Tone detector with noise detection and dynamic thresholding for robust performance | |||
| 238 | 6707886 | Method and system for testing subscriber loops using touchtone telephone signals | |||
| 239 | 6697476 | Audio conference platform system and method for broadcasting a real-time audio conference over the internet | |||
| 240 | 6694015 | Universal line interface in telecommunications system | |||
| 241 | 6694011 | Method and system for reliably detecting voiceband signaling tones | |||
| 242 | 6687368 | Tone signal detecting method and tone signal detector | |||
| 243 | 6683944 | Voice transmitter | |||
| 244 | 6683939 | Method and apparatus for logging DTMF phone symbols dialed from an extension | |||
| 245 | 6681000 | Signal converter server network information system control methods thereof and telephone terminal | |||
| 246 | 6674855 | High performance multifrequency signal detection | |||
2003 | |||||
| 247 | 6671252 | Robust signaling tone duration measurement | |||
| 248 | 6668057 | Apparatus for receiving tone signal, apparatus for transmitting tone signal, and apparatus for transmitting or receiving tone signal | |||
| 249 | 6661891 | Method and apparatus for detecting an activation tone | |||
| 250 | 6650662 | Method and system for transmitting a DTMF signal with compressed voice in a packet switching network | |||
| 251 | 6650627 | Tone detection in communication networks | |||
| 252 | 6636595 | Non-KSU message delivery system | |||
| 253 | 6625271 | Scalable audio conference platform | |||
| 254 | 6608896 | Efficient digital ITU-compliant zero-buffering DTMF detection using the non-uniform discrete Fourier transform | |||
| 255 | 6603836 | Interactive voice response apparatus capable of distinguishing between user's incoming voice and outgoing conditioned voice prompts | |||
| 256 | 6594347 | Speech encoding in a client server system | |||
| 257 | 6590972 | DTMF detection based on LPC coefficients | |||
| 258 | 6580792 | Signal detector with automatic gain control | |||
| 259 | 6577624 | System for controlling a telephony device bus in a switching system | |||
| 260 | 6575900 | Meter with integrated database and simplified telemedicine capability | |||
| 261 | 6560331 | System and method for precise DTMF signal detection | |||
| 262 | 6556674 | Signal detector with matched filter coefficient | |||
2002 | |||||
| 263 | 6498931 | CID message retrieval methods and devices | |||
| 264 | 6493441 | Method of controlling telecommunications signalling | |||
| 265 | 6493432 | System for ensuring calling party privacy in a call screening system | |||
| 266 | 6459785 | Method of providing a dial-in function in telecommunication systems | |||
| 267 | 6453153 | Employing customer premises equipment in communications network maintenance | |||
| 268 | 6449286 | R2 multi-frequency compelled signalling using a DSP on a network termination card | |||
| 269 | 6445773 | DMT test method for determining ADSL capability of cables | |||
| 270 | 6438224 | Tone detection | |||
| 271 | 6424925 | Circuit and method for detecting a tone signal | |||
| 272 | 6415139 | Detection circuit of tone signal | |||
| 273 | 6411687 | Call routing based on the caller's mood | |||
| 274 | 6385585 | Embedded data in a coded voice channel | |||
| 275 | 6385306 | Audio file transmission method | |||
| 276 | 6385299 | Line testing in a telecommunications network | |||
| 277 | 6381330 | False tone detect suppression using multiple frame sweeping harmonic analysis | |||
| 278 | 6370555 | Method and system for improved detection of analog signals | |||
| 279 | 6370506 | Communication devices, methods, and computer program products for transmitting information using voice activated signaling to perform in-call functions | |||
| 280 | 6370244 | Efficient digital ITU-compliant zero-buffering DTMF detection using the non-uniform discrete fourier transform | |||
| 281 | 6366652 | Method and apparatus for using a VM tone to prevent a voice announcement in a group call | |||
2001 | |||||
| 282 | 6330318 | Method of and system for interrupting and parking calls in a switched telecommunications network | |||
| 283 | 6320951 | Transfer-connect telephony services utilizing automated audio systems | |||
| 284 | 6307922 | Telephone transaction processing as a part of a call transport | |||
| 285 | 6269160 | Communications device including an improved CPE alerting signal (CAS) detection system | |||
| 286 | 6269159 | Conferencing with a calling party | |||
| 287 | 6259691 | System and method for efficiently transporting dual-tone multi-frequency/multiple frequency (DTMF/MF) tones in a telephone connection on a network-based telephone system | |||
| 288 | 6240093 | Transfer method of push-button signals | |||
| 289 | 6236967 | Tone and speech recognition in communications systems | |||
| 290 | 6229889 | Robust signaling tone frequency measurement | |||
| 291 | 6212265 | Method and apparatus for electronic mail notification | |||
| 292 | 6208966 | Telephone network service for converting speech to touch-tones | |||
| 293 | 6208959 | Mapping of digital data symbols onto one or more formant frequencies for transmission over a coded voice channel | |||
| 294 | 6205207 | Telephone transaction processing as a part of a call transport | |||
| 295 | 6201853 | Telephone technician's remote assist apparatus and method | |||
| 296 | 6195675 | Tone detection using discrete fourier transform techniques | |||
| 297 | 6195415 | Communication line test apparatus for a mobile radio system | |||
| 298 | 6172985 | Automatic detection of pots line | |||
| 299 | 6169783 | Line testing in a telecommunications network | |||
2000 | |||||
| 300 | 6157704 | Subscriber line test system for access network | |||
| 301 | 6154645 | Method and apparatus for using a MS tone to prevent a voice announcement in a group call | |||
| 302 | 6151514 | Method and apparatus for normalizing DTMF messages from a cellular mobile station | |||
| 303 | 6147973 | Signal discrimination apparatus, a method for discriminating a signal, and a signal transmitting apparatus for voiceband signals | |||
| 304 | 6128369 | Employing customer premises equipment in communications network maintenance | |||
| 305 | 6122652 | Tone and periodical signal detection | |||
| 306 | 6108343 | Dynamically reconfigurable DSP architecture for multi-channel telephony | |||
| 307 | 6097792 | Interactive method and apparatus for the generation of leads | |||
| 308 | 6078660 | Method and device for decoding a sequence of signals | |||
| 309 | 6072864 | Transfer-connect telephony services utilizing automated audio systems | |||
| 310 | 6072385 | Message sending system | |||
| 311 | 6046977 | Method and apparatus for detecting signal misalignment | |||
| 312 | 6035179 | Transmission of voice-frequency signals in a mobile telephone system | |||
| 313 | 6031903 | Method for expediting access to services on a switched communications network | |||
| 314 | 6028927 | Method and device for detecting the presence of a periodic signal of known period | |||
| 315 | 6021192 | Tone detector | |||
| 316 | 6020834 | System and method for transmitting coded data signals over a bandlimited bus | |||
1999 | |||||
| 317 | 5995557 | Tone detection with aliasing bandpass filters | |||
| 318 | 5982874 | Transmission system with improved tone detection | |||
| 319 | 5978676 | Inband signal converter, and associated method, for a digital communication system | |||
| 320 | 5978388 | Tone generator | |||
| 321 | 5966429 | Telephone transaction processing as a part of a call transport | |||
| 322 | 5963885 | Sensing circuit | |||
| 323 | 5963643 | Method and system for the transfer of information between two populations of persons, one nomadic and the other sedentary | |||
| 324 | 5960062 | Method of recording the communication between a CPE and a SPCS/server | |||
| 325 | 5937059 | DTMF detector for detecting DTMF signals using a digital signal processing chip and method thereof | |||
| 326 | 5933484 | Method for providing a menu to a subscriber on a switched communications network | |||
| 327 | 5920623 | Method and apparatus for defeating a predictive telemarketing system | |||
| 328 | 5910906 | Digital single-frequency tone detection in presence of aliases | |||
| 329 | 5907597 | Method and system for the secure communication of data | |||
| 330 | 5887248 | Audible tone signal service apparatus and method of a digital mobile services switching center | |||
| 331 | 5883940 | Interactive method and apparatus for the generation of leads | |||
| 332 | 5878131 | Interference attenuation for acoustic-dialers | |||
| 333 | 5872833 | Telephone transaction processing as a part of a call transport | |||
| 334 | 5862212 | Method and structure for detecting a customer premises equipment alerting signal | |||
| 335 | 5859913 | Method and system for the high-speed generation and transmission of a sequence of characters by means of voice frequencies | |||
1998 | |||||
| 336 | 5850438 | Transmission system with improved tone detection | |||
| 337 | 5850437 | Transmission system with improved tone detection | |||
| 338 | 5835574 | Dual-tone multi-frequency signal transfer protocol | |||
| 339 | 5825871 | Information storage device for storing personal identification information | |||
| 340 | 5822424 | Dial pulse detector and detecting method for paging service for mechanical telephone subscriber | |||
| 341 | 5818930 | Auto-dialer housing | |||
| 342 | 5810450 | Wheel assembly with lighting circuit | |||
| 343 | 5809453 | Methods and apparatus for detecting harmonic structure in a waveform | |||
| 344 | 5809133 | DTMF detector system and method which performs frequency domain energy calculations with improved performance | |||
| 345 | 5793862 | Information signal detection device and information signal detection method | |||
| 346 | 5790653 | Line-powered detection of call progress tones | |||
| 347 | 5781626 | Communication device capable of controlling transmission parameters of outputted DTMF signals | |||
| 348 | 5781625 | System and apparatus for generating within the premises a dial tone for enhanced phone services | |||
| 349 | 5765125 | Detection of tones while minimizing incorrect identification of other sounds as tones | |||
| 350 | 5764758 | Interrupted tone converter | |||
| 351 | 5757513 | Signal discrimination circuit | |||
| 352 | 5749067 | Voice activity detector | |||
| 353 | 5748711 | Telephone transaction processing as a part of call transport | |||
| 354 | 5748637 | DTMF signaling on four-wire switched 56 KBPS lines | |||
| 355 | 5745555 | System and method using personal identification numbers and associated prompts for controlling unauthorized use of a security device and unauthorized access to a resource | |||
| 356 | 5732133 | System and method for selecting and generating telephone access numbers for limiting access to a telephone service | |||
| 357 | 5729602 | Programmable multi-tone voice message starting system | |||
| 358 | 5719932 | Signal-recognition arrangement using cadence tables | |||
| 359 | 5710808 | Telephone dialling code processor | |||
1997 | |||||
| 360 | 5699421 | Telephone answering device with low cost dual tone multi-frequency detector | |||
| 361 | 5694466 | DTMF detector system and method which performs improved twist computation and thresholding | |||
| 362 | 5687177 | Tone blocking using variable delay buffer | |||
| 363 | 5668858 | Control device for a facsimile apparatus | |||
| 364 | 5666357 | DTMF tone passer in a voice communication system | |||
| 365 | 5659606 | Programmable modular apparatus and method for processing digital signals and detecting telephone tones | |||
| 366 | 5644634 | System and method for dual tone multifrequency detection using variable frame widths | |||
| 367 | 5638436 | Voice detection | |||
| 368 | 5638435 | Impulse signal convertor | |||
| 369 | 5633862 | DTMF signal transmission method in single frequency simultaneous transmitting and receiving system and single frequency simultaneous transmitting and receiving system transceiver capable of transmitting DTMF signal | |||
| 370 | 5627539 | Bidirectional signalling mechanism for interfacing computing devices to the analog telephone network | |||
| 371 | 5619565 | Voice activity detection method and apparatus using the same | |||
| 372 | 5619564 | Tone detector with improved performance in the presence of speech | |||
| 373 | 5615255 | Method and apparatus for measuring loads in a common channel signalling link | |||
| 374 | 5612617 | Frequency detection circuit | |||
| 375 | 5610978 | Ring discriminator | |||
| 376 | 5604793 | Tone blocking using variable delay buffer | |||
| 377 | 5592544 | DTMF signal judging apparatus | |||
1996 | |||||
| 378 | 5588053 | DTMF detector system and method which performs static and dynamic thresholding | |||
| 379 | 5588052 | DTMF signal judging apparatus | |||
| 380 | 5583933 | Method and apparatus for the secure communication of data | |||
| 381 | 5572588 | Method and apparatus for detecting reception of a tone signal | |||
| 382 | 5563942 | Digital call progress tone detection method with programmable digital call progress tone detector | |||
| 383 | 5561700 | Device for measuring analog telephony signals | |||
| 384 | 5553116 | Telephone line monitoring apparatus and method | |||
| 385 | 5535271 | Apparatus and method for dual tone multifrequency signal detection | |||
| 386 | 5533118 | Voice activity detection method and apparatus using the same | |||
| 387 | 5530950 | Audio data processing | |||
| 388 | 5530743 | Telephone exchange apparatus and tone sending method in telephone exchange apparatus | |||
| 389 | 5528663 | DTMF detection for voice processing equipment | |||
| 390 | 5524139 | System for automatic access to automated telephonic information services | |||
| 391 | 5519774 | Method and system for detecting at a selected station an alerting signal in the presence of speech | |||
| 392 | 5506885 | Method of adapting processing parameters in a call processing system | |||
| 393 | 5495526 | Tone-detection method for detecting at least one tone in a dual-tone multifrequency signal, call-progress method using the same | |||
| 394 | 5483593 | Call progress decoder for multiple cadenced tones on telephone lines | |||
1995 | |||||
| 395 | 5479501 | Far-end disconnect detector for telephony systems | |||
| 396 | 5479498 | Digital line card having universal port for upgrading electronic messaging system | |||
| 397 | 5477465 | Multi-frequency receiver with arbitrary center frequencies | |||
| 398 | 5471507 | Circuit for detecting object signal from input signal | |||
| 399 | 5465287 | Subscriber line impedance measurement device and method | |||
| 400 | 5465256 | Telephone cross connect status signal pre-processor | |||
| 401 | 5459785 | DTMF signal receiving circuit | |||
| 402 | 5459784 | Dual-tone multifrequency (DTMF) signalling transparency for low-data-rate vocoders | |||
| 403 | 5459781 | Selectively activated dual tone multi-frequency detector | |||
| 404 | 5457690 | DTMF Signaling on four-wire switched 56 Kbps Lines | |||
| 405 | 5442696 | Method and apparatus for detecting control signals | |||
| 406 | 5442694 | Ring tone detection for a telephone system | |||
| 407 | 5436964 | Programmable call progress tones for a switching system | |||
| 408 | 5428680 | DTMF signal receiving apparatus equipped with a DTMF signal judging circuit | |||
| 409 | 5428662 | Detecting make-break clicks on a telephone line | |||
| 410 | 5426696 | Method of improving receiver sensitivity and speech immunity with DTMF-reception | |||
| 411 | 5422945 | Fast last digit detection of a dialed telephone number | |||
| 412 | 5416836 | Disconnect signalling detection arrangement | |||
| 413 | 5416835 | Automatic signaling-type indicator for use in subsequent interactive dialing | |||
| 414 | 5408529 | Dual tone detector operable in the presence of speech or background noise and method therefor | |||
| 415 | 5406621 | Telephone tone analysis system | |||
| 416 | 5400394 | Adaptive echo canceller for voice messaging system | |||
| 417 | 5398031 | DTMF signal generating circuit | |||
| 418 | 5396536 | Automatic processing of calls with different communication modes in a telecommunications system | |||
| 419 | 5392348 | DTMF detection having sample rate decimation and adaptive tone detection | |||
| 420 | 5392347 | Ringing tone signal detecting circuit | |||
| 421 | 5390244 | Method and apparatus for periodic signal detection | |||
1994 | |||||
| 422 | 5375166 | Communication apparatus with cross-talk protection | |||
| 423 | 5369693 | Telephonic telemeeting system | |||
| 424 | 5363443 | Differing frequency sine wave generation from a look-up table | |||
| 425 | 5359652 | Tone receiver comprising a switch capacitor zero crossing detector | |||
| 426 | 5353346 | Multi-frequency signal detector and classifier | |||
| 427 | 5353345 | Method and apparatus for DTMF detection | |||
| 428 | 5353344 | Method of determining levels at given frequencies of a VF signal | |||
| 429 | 5353342 | Adaptive multitone signaling method | |||
| 430 | 5349254 | Call progress detection circuit | |||
| 431 | 5347611 | Apparatus and method for transparent tone passing over narrowband digital channels | |||
| 432 | 5347572 | Telephone line monitoring apparatus and method | |||
| 433 | 5343414 | Apparatus for adaptively tuning to a received periodic signal | |||
| 434 | 5339251 | Apparatus for adaptively tuning to a received periodic signal | |||
| 435 | 5337347 | Method and system for progressive database search termination and dynamic information presentation utilizing telephone keypad input | |||
| 436 | 5333191 | Detection of multifrequency tone signals | |||
| 437 | 5325427 | Apparatus and robust method for detecting tones | |||
| 438 | 5321745 | Adaptive efficient single/dual tone decoder apparatus and method for identifying call-progression signals | |||
| 439 | 5319703 | Apparatus and method for identifying speech and call-progression signals | |||
| 440 | 5311589 | Apparatus and method for audible signaling tone recognition | |||
| 441 | 5311588 | Call progress detection circuitry and method | |||
| 442 | 5311575 | Telephone signal classification and phone message delivery method and system | |||
| 443 | 5307404 | Signal detecting device | |||
| 444 | 5295223 | Voice/voice band data discrimination apparatus | |||
| 445 | 5287405 | Called party response detecting apparatus | |||
1993 | |||||
| 446 | 5267305 | Transparent inband signaling | |||
| 447 | 5265097 | Data processor | |||
| 448 | 5263081 | Method and apparatus for providing on-hook transmission for digital loop carrier channel units | |||
| 449 | 5257309 | Dual tone multifrequency signal detection and identification methods and apparatus | |||
| 450 | 5255310 | Method of approximately matching an input character string with a key word and vocally outputting data | |||
| 451 | 5251256 | Independent hysteresis apparatus for tone detection | |||
| 452 | 5247574 | Adaptive no balance DX signalling circuit | |||
| 453 | 5241591 | Telephone system having a dial data changeover switch | |||
| 454 | 5241579 | Status management method of a signalling service device in an electric switching system | |||
| 455 | 5222129 | Telephone charging signalling detector suitable for central office line interface circuits | |||
| 456 | 5218636 | Dial pulse digit detector | |||
| 457 | 5218635 | Low-frequency alternating current signal detector, in particular for central office line interface circuits | |||
| 458 | 5214693 | Multi-frequency signal receiver and a method of detecting the multi-frequency signal | |||
| 459 | 5198992 | Method and apparatus for improving wideband detection of a tone | |||
| 460 | 5195128 | Communication system, particularly a telephone communication system | |||
| 461 | 5181236 | Automatic call returning method for call distributor with message record capability | |||
| 462 | 5177785 | Method and system for secure telecommunications | |||
| 463 | 5177781 | Dialing pulse signature recognizing method and device | |||
1992 | |||||
| 464 | 5172406 | DTMF signal detection apparatus | |||
| 465 | 5163084 | Voice information service system and method utilizing approximately matched input character string and key word | |||
| 466 | 5163050 | Configurable parameter DTMF detector | |||
| 467 | 5151935 | Programmable universal signaling circuit for a telephone network | |||
| 468 | 5144652 | Device for connecting a subscriber line to a selected internal line | |||
| 469 | 5144626 | Data processor | |||
| 470 | 5142569 | Apparatus for selectively enabling subscriber device to respond to ringing signal in dependence upon ringing cadence | |||
| 471 | 5140590 | Telephone or data switching system with variable protocol inter-office communication | |||
| 472 | 5138569 | Dual tone multi-frequency detector | |||
| 473 | 5127004 | Tone and announcement message code generator for a telephonic switching system and method | |||
| 474 | 5119418 | Telephone system with several terminals on a single line | |||
| 475 | 5119322 | Digital DTMF tone detector | |||
| 476 | 5117369 | DTMF receiver | |||
| 477 | 5109409 | Apparatus and method to detect telephony signaling states | |||
| 478 | 5099498 | Method for suppressing quantization noises superimposed on a sinusoidal audible tone transmitted in a digital telecommunications exchange system | |||
| 479 | 5086462 | Terminal repeater having a function for repeating DC loop signal | |||
| 480 | 5086456 | Dial unit detachably mounted on public telephone for equal access | |||
1991 | |||||
| 481 | 5077735 | Method and an apparatus for mutually converting different signaling systems | |||
| 482 | 5073941 | Multifrequency detection | |||
| 483 | 5070526 | Signal analyzing system | |||
| 484 | 5060259 | Call progress capability for a switched channel data service unit | |||
| 485 | 5047764 | Paging system with dynamically programmable reception frequencies | |||
| 486 | 5034978 | Universal channel unit switchable between two wire and four wire configurations | |||
| 487 | 5022055 | Trunk dialing converter | |||
| 488 | 5007000 | Classification of audio signals on a telephone line | |||
| 489 | 4995076 | Call progress capability for a switched channel data service unit | |||
| 490 | 4993063 | Channel unit interface circuit | |||
1990 | |||||
| 491 | 4979214 | Method and apparatus for identifying speech in telephone signals | |||
| 492 | 4979171 | Announcement and tone code generator for telephonic network and method | |||
| 493 | 4972466 | Digital composite tone alerting | |||
| 494 | 4945555 | Method and means for remote testing of unused telephone lines | |||
| 495 | 4944001 | Rotary dial pulse receiver | |||
| 496 | 4939765 | Interlock circuit for preventing corruption of telephone line signals | |||
| 497 | 4937851 | Loop status verification system | |||
| 498 | 4932043 | Apparatus for controlling key telephone station set in key telephone system | |||
| 499 | 4930152 | Call return telephone service | |||
| 500 | 4926461 | Telephone answering machine having call transfer capabilities | |||
| 501 | 4924501 | Dial pulse selection | |||
| 502 | 4922528 | Circuitry for recognizing two-tone compound signals in telephone installations | |||
| 503 | 4922527 | Small electronic apparatus | |||
| 504 | 4920561 | Ring detector for telephone line | |||
| 505 | 4918719 | Elimination of false requests for telephone operator assistance | |||
| 506 | 4912755 | Line current test device | |||
| 507 | 4908825 | Memory organization and output sequencer for a signal processor | |||
| 508 | 4907262 | Method of transmitting dual tone multi-frequency during communication in a private branch exchange using keyphones | |||
| 509 | 4893332 | Low-powered remote sensor | |||
1989 | |||||
| 510 | 4881073 | Paging system with dynamically programmable reception frequencies | |||
| 511 | 4878051 | Paging system with commands for changing functionality of a paging receiver | |||
| 512 | 4876538 | Paging system sublocal switch | |||
| 513 | 4868873 | Pulse detector for counting dial generated pulses | |||
| 514 | 4868872 | Telephone tone detector | |||
| 515 | 4868861 | Trunk dialing converter | |||
| 516 | 4868558 | Paging system lata switch | |||
| 517 | 4853958 | LPC-based DTMF receiver for secondary signalling | |||
| 518 | 4852160 | Channel unit interface circuit | |||
| 519 | 4852157 | Multi-task state machine signalling translator | |||
| 520 | 4849688 | Detection of single-frequency signals | |||
| 521 | 4839920 | Method for determining telephone dial pulse parameters independently of subscriber line length | |||
| 522 | 4839842 | Digital tone detection and generation | |||
| 523 | 4829562 | Receiver for detecting different fixed frequency signals on a telephone trunkline | |||
| 524 | 4821313 | Paystation transmitter ground detect circuitry | |||
| 525 | 4815126 | Telephone line switch | |||
| 526 | 4815124 | DX circuit | |||
| 527 | 4811386 | Called party response detecting apparatus | |||
| 528 | 4797931 | Audio frequency signal identification apparatus | |||
| 529 | 4796290 | Ground start circuit | |||
| 530 | 4796287 | Digital loudspeaking telephone | |||
1988 | |||||
| 531 | 4792985 | Transmitters and systems for tone-in-band transmission | |||
| 532 | 4782523 | Tone detection process and device for implementing said process | |||
| 533 | 4764966 | Method and apparatus for voice detection having adaptive sensitivity | |||
| 534 | 4757267 | Telephone system for connecting a customer to a supplier of goods | |||
| 535 | 4747131 | Dial tone detector | |||
| 536 | 4742537 | Telephone line monitoring system | |||
| 537 | 4742534 | Telephone receiving equipment for recognizing predetermined combinations of voice-frequency signalling components | |||
| 538 | 4742251 | Precise call progress detector | |||
| 539 | 4737987 | Circuit for evaluating call signals in a telecommunication system | |||
| 540 | 4737720 | DTMF generation using pre-summed tables | |||
| 541 | 4731827 | Interswitch line circuit | |||
| 542 | 4718057 | Streamlined digital signal processor | |||
1987 | |||||
| 543 | 4709344 | Programmable multifrequency digital tone receiver | |||
| 544 | 4701950 | Telephone answering system with line detector | |||
| 545 | 4701948 | Communication system having separate unidirectional information signalling | |||
| 546 | 4698769 | Supervisory audio tone detection in a radio channel | |||
| 547 | 4696031 | Signal detection and discrimination using waveform peak factor | |||
| 548 | 4694482 | Digital tone detector | |||
| 549 | 4689760 | Digital tone decoder and method of decoding tones using linear prediction coding | |||
| 550 | 4686702 | Signal transmission control apparatus | |||
| 551 | 4686699 | Call progress monitor for a computer telephone interface | |||
| 552 | 4686490 | Digital data modulator and digital-to-analog converter | |||
| 553 | 4683567 | Asynchronous signaling system for digital communication channel | |||
| 554 | 4680758 | Switching system having tone trunk | |||
| 555 | 4679232 | Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed | |||
| 556 | 4679001 | Adaptive stop-notch filter | |||
| 557 | 4672603 | Combined analog/digital CCIS data transmitter/receiver circuit | |||
| 558 | 4669114 | Digital tone detector | |||
| 559 | 4669110 | Call progress tone system | |||
| 560 | 4644476 | Dialing tone generation | |||
| 561 | 4644345 | Interleaved dual bank encoder | |||
| 562 | 4639553 | Call signal detecting device | |||
1986 | |||||
| 563 | 4626629 | Digital multifrequency signal receiver | |||
| 564 | 4626628 | Telephone line circuit having time-shared DTMF receivers | |||
| 565 | 4617427 | Square root circuit | |||
| 566 | 4614909 | Apparatus for identifying digital multi-frequency signals | |||
| 567 | 4614840 | Telecommunication line circuit and associated polarity reversal circuit | |||
| 568 | 4611325 | DTMF receiver sense and control arrangement | |||
| 569 | 4604755 | Feed forward dual channel automatic level control for dual tone multi-frequency receivers | |||
| 570 | 4604713 | Tone detector and multifrequency receiver using said detector | |||
| 571 | 4602131 | Touch tone decoder | |||
| 572 | 4599700 | Process and device for digital frequency generation | |||
| 573 | 4599495 | Apparatus for multifrequency signalling tone detection | |||
| 574 | 4593156 | Grounded tip detector | |||
| 575 | 4592051 | Activation in a digital subscriber connection | |||
| 576 | 4590595 | Apparatus for detecting in-band single frequency signaling tones from FDM channels | |||
| 577 | 4590432 | Constant-percent break pulse corrector | |||
| 578 | 4574376 | Activation of a transmission link by code sending | |||
| 579 | 4571723 | Pulse code modulated digital telephony tone generator | |||
| 580 | 4570260 | Digital tone signal generator for telephony system | |||
| 581 | 4570235 | Digital receiver of multifrequency signals with frequency recognition device | |||
| 582 | 4567328 | Energy detection circuit for a facsimile system controller | |||
| 583 | 4563681 | Tone receiver for digital data communication systems | |||
1985 | |||||
| 584 | 4555593 | Electronic telephone relay | |||
| 585 | 4554542 | Guard tone capture method | |||
| 586 | 4554416 | Low voltage two wire to four wire telephone circuit converter apparatus | |||
| 587 | 4552994 | Apparatus for isolating the voice frequency path from the floating battery feed during signalling | |||
| 588 | 4551670 | Circuit for maintaining the DC voltage on an electrically isolated telecommunication line at a reference level | |||
| 589 | 4550225 | AC Signal-activated switching apparatus | |||
| 590 | 4546490 | Single frequency detection circuit | |||
| 591 | 4541088 | Tone generation circuit for automatic PCM-TDM telecommunication exchange | |||
| 592 | 4540854 | Subscriber line interface circuit | |||
| 593 | 4539692 | Digital automatic gain control circuit for PCM signals | |||
| 594 | 4536614 | Supervision and dial pulse detection circuit for a telephone subscriber line | |||
| 595 | 4535454 | Multifrequency tone distribution using a conferencing arrangement | |||
| 596 | 4535201 | Ground start detection in telephone loop signalling circuit | |||
| 597 | 4534041 | Digital circuit for determining the envelope frequency of PCM encoded call progress tones in a telephone system | |||
| 598 | 4528664 | Call progress signal monitor and method for telephone systems | |||
| 599 | 4523056 | Telephone including resistive array for dialing and system for using such telephone | |||
| 600 | 4521647 | Tone detection system and method | |||
| 601 | 4510601 | Digital frequency receiver | |||
| 602 | 4502049 | Universal signalling tone receiver | |||
| 603 | 4498171 | Tone source for telephone systems | |||
1984 | |||||
| 604 | 4484035 | Dual tone multi frequency digital detector | |||
| 605 | 4479229 | Arrangement for and method of detecting multi-frequency sound code signals | |||
| 606 | 4479188 | Digital detector for a multi-frequency code in an analog signal | |||
| 607 | 4476557 | Duplex signaling circuit | |||
| 608 | 4467469 | Circuitry for recovery of data from certain bit positions of a T1 span | |||
| 609 | 4467277 | Programmable detector for tone signals | |||
| 610 | 4460808 | Adaptive signal receiving method and apparatus | |||
| 611 | 4460806 | Dual tone multifrequency and dial pulse receiver | |||
| 612 | 4459435 | Telephone privacy apparatus | |||
| 613 | 4454477 | Loop current detector with threshold setting impedance | |||
| 614 | 4440979 | Current sink for DPT channel unit | |||
| 615 | 4439639 | Digital circuit and method for the detection of call progress tones in telephone systems | |||
| 616 | 4435620 | Dial pulse delay circuit | |||
| 617 | 4431872 | Telecommunication receivers | |||
1983 | |||||
| 618 | 4412299 | Phase jitter detector | |||
| 619 | 4410982 | Arrangement for extending digital signaling to telephone subscribers' substations | |||
| 620 | 4403298 | Adaptive techniques for automatic frequency determination and measurement | |||
| 621 | 4401860 | Frequency signaling method and apparatus with dynamic compensation for frequency errors | |||
| 622 | 4399536 | Convolution filter arrangement for digital multifrequency receiver | |||
| 623 | 4399535 | Digital tone generator | |||
| 624 | 4395595 | Digital pushbutton signalling receiver | |||
| 625 | 4393496 | Method for feeding call progress tones into conference connections | |||
| 626 | 4392206 | Printer | |||
| 627 | 4390983 | Digital frequency sender | |||
| 628 | 4386239 | Multifrequency tone detector | |||
| 629 | 4385385 | Circuit for monitoring a digital signal generator | |||
| 630 | 4385208 | Multifrequency receiver | |||
| 631 | 4384175 | Tone detection method and arrangement for observing and classifying repetitive status signals | |||
| 632 | 4383313 | Tone generator for PAM/TDM telecommunication system | |||
| 633 | 4379347 | Receiver for PCM-encoded multifrequency dialing signals | |||
| 634 | 4375102 | Digital code word detection | |||
| 635 | 4375014 | Current sensing trigger for a telephone system | |||
1982 | |||||
| 636 | 4366348 | Method and apparatus for decoding and processing the informational content of multi-frequency signals | |||
| 637 | 4363100 | Detection of tones in sampled signals | |||
| 638 | 4361875 | Multiple tone detector and locator | |||
| 639 | 4355405 | Digital signalling system | |||
| 640 | 4354248 | Programmable multifrequency tone receiver | |||
| 641 | 4347408 | Multi-frequency signal receiver | |||
| 642 | 4347406 | Pulse detector circuit | |||
| 643 | 4336467 | Voltage detector | |||
| 644 | 4334273 | Signal processing system using a digital technique | |||
| 645 | 4328398 | Digital multi-frequency receiver | |||
| 646 | 4326105 | Dial pulse detector | |||
| 647 | 4322686 | Frequency comparator circuit | |||
| 648 | 4319334 | Frequency sensing device for reducing non-periodic components | |||
| 649 | 4319092 | Current detection circuit arrangement for an automatic telephone exchange | |||
| 650 | 4319091 | Dial pulse restorer | |||
| 651 | 4313107 | Tone signal detectors | |||
| 652 | 4313038 | DTMF Signal receiver | |||
| 653 | 4311878 | Dialing interval transmission gating arrangement | |||
1981 | |||||
| 654 | 4301334 | Telecommunication subscriber line access circuit with ground key and insulation fault indication | |||
| 655 | 4300024 | Technique for measuring a duration of signaling pulses in a telephone circuit | |||
| 656 | 4292473 | Loop supervision circuit | |||
| 657 | 4286326 | Digital devices for spectrum analysis | |||
| 658 | 4286221 | Multi-frequency signal receiving apparatus | |||
| 659 | 4279017 | Method and device for detecting the presence of one or more pulse code modulated multi-frequency code signals | |||
| 660 | 4278842 | Circuit for eliminating spurious pulses in a dial pulse stream | |||
| 661 | 4277650 | Single frequency tone receiver | |||
| 662 | 4273965 | Tone decoding circuit | |||
| 663 | 4266099 | Pulse rejection and duration correction circuit | |||
| 664 | 4255623 | Apparatus for pulse train measurement | |||
| 665 | 4245325 | Digital multifrequency signalling receiver | |||
1980 | |||||
| 666 | 4231018 | Tone signal detector | |||
| 667 | 4230912 | Dial pulse sensor and repeater circuit | |||
| 668 | 4230908 | Telephone summing circuit | |||
| 669 | 4227248 | PCM Tone signal generator | |||
| 670 | 4227055 | Multifrequency receiver | |||
| 671 | 4227054 | Digital constant-percent break pulse corrector | |||
| 672 | 4223185 | Multifrequency digital signal receiver | |||
| 673 | 4223184 | Minimum break/make pulse corrector | |||
| 674 | 4221936 | Loop to ground start circuit | |||
| 675 | 4219699 | Telephone supervision system using DTMF signals | |||
| 676 | 4218589 | Method and apparatus for testing tone generators | |||
| 677 | 4216463 | Programmable digital tone detector | |||
| 678 | 4211897 | Multifrequency signal receiving system | |||
| 679 | 4207436 | Constant percent break type dial pulse corrector | |||
| 680 | 4206323 | Dual tone multifrequency signal receiver | |||
| 681 | 4205203 | Methods and apparatus for digitally signaling sounds and tones in a PCM multiplex system | |||
| 682 | 4204094 | Tone applying line circuit | |||
| 683 | 4203008 | Digital signalling receiver for receiving PCM tones | |||
| 684 | 4199729 | Variable peak detector | |||
| 685 | 4198547 | Pulse circuit for two wire electronic PABX stations | |||
| 686 | 4197502 | Digital signal detector | |||
| 687 | 4196321 | Loopback test system | |||
| 688 | 4194092 | Device for detecting a frequency in a PCM coded signal | |||
| 689 | 4191862 | Dual frequency tone decoder | |||
| 690 | 4187403 | Voice-protected, frequency-selective signal receiver | |||
| 691 | 4185172 | Method of and means for detecting digitized multi frequency-coded signals | |||
| 692 | 4184053 | Ringing signal detector | |||
1979 | |||||
| 693 | 4176286 | Signal translator with squelch | |||
| 694 | 4174466 | Multi-party telephone system allowing speech connection between extensions as between extensions and an outer line | |||
| 695 | 4171466 | Digital wave generator for composite tone | |||
| 696 | 4169969 | Apparatus for detecting in-band signalling signals | |||
| 697 | 4165450 | Telephone signalling test system | |||
| 698 | 4153819 | Telephone tone signalling receiver with up-conversion of frequency of tones controlled by word instructions | |||
| 699 | 4146751 | Solid state pulsing apparatus for pulsing selected line relay terminals | |||
| 700 | 4145580 | Multi-frequency signal receiver | |||
| 701 | 4145576 | DTMF and rotary dial signal receiver | |||
| 702 | 4140880 | Hold tone scanner | |||
| 703 | 4133982 | AC supervisory signal detector circuit | |||
| 704 | 4133979 | Multifrequency sender/receiver in a multi-time slot digital data stream | |||
1978 | |||||
| 705 | 4130736 | Telecommunication system with keyboard selection | |||
| 706 | 4129756 | Telephone exchange signalling unit | |||
| 707 | 4124898 | Programmable clock | |||
| 708 | 4119808 | Multi-frequency receiver circuits | |||
| 709 | 4110565 | Duplex telephone signalling system | |||
| 710 | 4109109 | Method and apparatus for detecting the presence of signal components of predetermined frequency in multifrequency PCM signal | |||
| 711 | 4107475 | Receiver apparatus for detection of two voice frequencies in a multifrequency tone signal | |||
| 712 | 4101733 | Electronic DX signaling circuit | |||
| 713 | 4099125 | Frequency error correction circuit | |||
| 714 | 4097812 | Frequency selective detector circuit | |||
| 715 | 4092499 | Apparatus for detecting a voice frequency signal | |||
| 716 | 4091243 | Multifrequency signal receiver | |||
| 717 | 4088838 | Voice response system | |||
| 718 | 4087649 | Pulse counting circuit | |||
| 719 | 4087644 | Dial impulse relay circuit | |||
| 720 | 4085295 | Multi-frequency signal receivers | |||
| 721 | 4082924 | Reference signal circuit in a receiver for detecting two frequencies in a multifrequency tone signal | |||
| 722 | 4080516 | Multi-frequency signal receiver | |||
| 723 | 4076965 | Universal receiver/sender | |||
| 724 | 4075569 | Digital method and apparatus for dynamically generating an output pulse train having a desired duty cycle from an input pulse train | |||
| 725 | 4075513 | Averaging and peak detection circuit | |||
| 726 | 4071879 | Reversible current apparatus | |||
| 727 | 4071708 | Dial pulse detector | |||
| 728 | 4070631 | Digital noise blanking circuit | |||
| 729 | 4068309 | Method and device for detecting two different frequency amplitude and phase signals in a combined digital signal | |||
| 730 | 4068104 | Interface for in band SCPC supervisory and signalling system | |||
| 731 | 4066846 | Combined rotary dial and touch-tone telephone decoding system | |||
1977 | |||||
| 732 | 4064488 | Sampled signal detector | |||
| 733 | 4061885 | Digital tone decoder | |||
| 734 | 4060797 | Serial digital bit stream code detector | |||
| 735 | 4055730 | Circuit for detecting dial pulses | |||
| 736 | 4051385 | Active networks and signalling equipment | |||
| 737 | 4048450 | Trunk circuit traffic analyzer | |||
| 738 | 4047114 | Digital detector | |||
| 739 | 4045620 | Digital tone detector | |||
| 740 | 4044206 | Digital decoder for multiple frequency telephone signalling | |||
| 741 | 4042790 | Voice guard circuit for a tone receiver | |||
| 742 | 4042789 | Tone combination detector and coincidence timer circuit | |||
| 743 | 4042788 | Tone detector | |||
| 744 | 4042787 | Output processing and output coupling circuit for a digital tone receiver | |||
| 745 | 4041248 | Tone detection synchronizer | |||
| 746 | 4037171 | High speed tone decoder utilizing a phase-locked loop | |||
| 747 | 4034300 | Circuit arrangement for evaluating received oscillations of a predetermined frequency | |||
| 748 | 4028501 | Method and apparatus for translating multiple frequency signalling | |||
| 749 | 4027102 | Voice versus pulsed tone signal discrimination circuit | |||
| 750 | 4025730 | In-band signal receiver | |||
| 751 | 4021620 | Multifrequency signal receiver with digital tone receiver | |||
| 752 | 4019114 | Circuit arrangement for the ungrounded transmission of signals through testing points in communication facilities | |||
| 753 | 4018996 | Communication network protection system | |||
| 754 | 4018991 | Multifrequency signal parity detector | |||
| 755 | 4016371 | Frequency tone detection | |||
| 756 | 4016370 | Digital tone decoder | |||
| 757 | 4010328 | Out-of-band signaling method and apparatus to adapt payphones to telephone systems | |||
| 758 | 4009354 | Signalling device for key telephone systems | |||
| 759 | 4009353 | Analog signal detection | |||
| 760 | 4004238 | Method and apparatus for the removal of ringing phenomena from signal impulses | |||
| 761 | 4004105 | Multifrequency signal receiver for use in telephone signaling systems or the like | |||
| 762 | 4002848 | Toll fraud eliminator for telephone systems | |||
| 763 | 4001521 | Signal identification system | |||
1976 | |||||
| 764 | 3999013 | Bi-directional signaling apparatus | |||
| 765 | 3997727 | Time division multiplexed digital switching apparatus | |||
| 766 | 3993875 | Tone receiver | |||
| 767 | 3991324 | Dial pulse detector | |||
| 768 | 3990006 | Digital tone detector using concatenated detection intervals | |||
| 769 | 3988687 | Step-servoed tone detector | |||
| 770 | 3988548 | Dial pulse correction circuit for telephone signaling system | |||
| 771 | 3988547 | Telecommunication system having means for converting multifrequency selection signals into digital pulse trains | |||
| 772 | 3987249 | System for addressed timemultiplexed telecommunication | |||
| 773 | 3986112 | Novel technique for frequency detection utilizing switching filters | |||
| 774 | 3985970 | Regeneration of signalling pulses | |||
| 775 | 3985966 | Method and apparatus for generating digital dual frequency signals | |||
| 776 | 3985965 | Digital signal generator | |||
| 777 | 3979562 | Decoder | |||
| 778 | 3978283 | Switching arrangement for receiving DC signals | |||
| 779 | 3976843 | MFC receiver digital signal processing | |||
| 780 | 3971899 | Signalling device for key telephone systems | |||
| 781 | 3971897 | Circuit arrangement for a selective signal receiver, particularly for use in telephone systems | |||
| 782 | 3965457 | Digital control processor | |||
| 783 | 3963878 | Signal interpreting system for frequency selective multifrequency tone dialing | |||
| 784 | 3962541 | Frequency sample-and-hold circuit | |||
| 785 | 3961167 | PCM tone receiver using optimum statistical technique | |||
| 786 | 3961143 | Multi-frequency signalling system | |||
| 787 | 3961141 | Stop time-out until after first DTMF digit dialed circuit | |||
| 788 | 3959603 | Dual tone multiple frequency receiver/decoder | |||
| 789 | 3949177 | Method for frequency-recognition in selective signal receivers for use in telecommunication, particularly telephone systems | |||
| 790 | 3944753 | Apparatus for distinguishing voice and other noise signals from legitimate multi-frequency tone signals present on telephone or similar communication lines | |||
| 791 | 3941944 | Signalling device for key telephone systems | |||
| 792 | 3941937 | Dial pulse receiver | |||
| 793 | 3937899 | Tone detector using spectrum parameter estimation | |||
| 794 | 3936801 | Multifrequency signal receiver timing circuit | |||
| 795 | 3936611 | Time compression scanner | |||
| 796 | 3935395 | Selective signal receiver for use in telecommunication systems | |||
| 797 | 3935392 | Dial pulse detection method and apparatus | |||
| 798 | 3934097 | Multifrequency tone detection | |||
| 799 | 3934096 | Multi-frequency signal receiving circuit | |||
| 800 | 3932713 | Induction cancellation circuit | |||
| 801 | 3932708 | Frequency-selective signal receiver for communication equipments, more particularly telephone equipments | |||
| 802 | 3931480 | Time compression receiver | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||