СПИСОК патентов США - подгруппа МПК16 H04B1/54
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| № п/п | Номер патента | Название патента | |||
2016 | |||||
| 1 | 9525503 | Reconfigurable multi-mode transceiver | |||
| 2 | 9525453 | Intermodulation cancellation of third-order distortion in an FDD receiver | |||
| 3 | 9461673 | Computing device with configurable antenna | |||
| 4 | 9374127 | Balancing method of tunable duplexer | |||
| 5 | 9319078 | Wireless communication device and sensing method | |||
| 6 | 9246534 | Controling Tx/Rx mode in serial half-duplex UART separately from host | |||
2015 | |||||
| 7 | 9172401 | Computing device with configurable antenna | |||
| 8 | 9154177 | Method for controlling transmission/reception timing of base station antenna for TDD wireless communications and base station antenna using the same | |||
2013 | |||||
| 9 | 8379547 | Resource selection for transmission of multiple ACK/NACK on PUCCH channel | |||
2011 | |||||
| 10 | 7973608 | Phase locked loop, semiconductor device, and wireless tag | |||
2005 | |||||
| 11 | 6931122 | Single transformer hybrid system and method | |||
| 12 | 6917823 | Cellular telephone | |||
| 13 | 6917682 | Method and device for echo cancelling | |||
| 14 | 6898191 | Digital radio | |||
| 15 | 6888939 | Circuit for joint transmitting voice and data over a telephone line | |||
| 16 | 6859655 | TDD FDD air interface | |||
| 17 | 6859051 | Systems and methods for impedance synthesis | |||
2004 | |||||
| 18 | 6829352 | Amplifier arrangement | |||
| 19 | 6804349 | Hybrid transceiver circuit | |||
| 20 | 6795690 | Full-duplex transceiver with distributed duplexing function | |||
| 21 | 6795495 | Line driver with output impedance synthesis | |||
| 22 | 6785325 | DSL splitter providing test access to an interconnected subscriber loop and method | |||
| 23 | 6775529 | Active resistive summer for a transformer hybrid | |||
| 24 | 6771770 | Hybrid circuit for a broadband modem | |||
| 25 | 6748076 | Method for separating narrowband and broadband services on a transmission link and a splitter element | |||
| 26 | 6747966 | Radio system and methods for duplex operation | |||
| 27 | 6744831 | Adaptive electronic transmission signal cancellation apparatus for full duplex communication | |||
| 28 | 6717981 | Transmitter image suppression in TDD transceivers | |||
| 29 | 6700387 | Systems and methods for impedance synthesis | |||
| 30 | 6681100 | Smart amplifier for time division duplex wireless applications | |||
2003 | |||||
| 31 | 6647115 | Method and apparatus for an improved analog echo canceller | |||
| 32 | 6633642 | Balance network directional coupler system and method | |||
| 33 | 6591086 | Enhanced time division duplexing (TDD) transceiver circuitry | |||
| 34 | 6573729 | Systems and methods for impedance synthesis | |||
| 35 | 6552446 | Method and device for electric supply in a mobile apparatus | |||
| 36 | 6549567 | Full duplex ultrawide-band communication system and method | |||
| 37 | 6522728 | Apparatus and method of implementing a universal home network on a customer premises ISDN bus | |||
| 38 | 6507728 | Radio transceiver and a method of preventing transmission spurious response | |||
| 39 | 6507651 | Hybrid amplifier | |||
2002 | |||||
| 40 | 6477250 | Adjustable hybrid having dial tone alignment configuration | |||
| 41 | 6470046 | Apparatus and method for a combined DSL and voice system | |||
| 42 | 6462523 | Load-synchronous doppler charge pump with an integrated series-path regulator | |||
| 43 | 6434122 | Filtering method to allow FDD and TDD operation in PCS transreceivers | |||
| 44 | 6426970 | Bi-directional signal coupler method and apparatus | |||
| 45 | 6408193 | Cellular telephone | |||
| 46 | 6400822 | Linear, optical coupled line impedance circuit | |||
| 47 | 6385470 | Method and device for controlling the power consumption of a mobile radio device | |||
| 48 | 6373908 | Adaptive electronic transmission signal cancellation apparatus for full duplex communication | |||
| 49 | 6369650 | Impedance synthesis and DC biasing method and architecture for DSL/cable line drivers | |||
2001 | |||||
| 50 | 6327309 | Bidirection channels using common pins for transmit and receive paths | |||
| 51 | 6292047 | Switching down conversion mixer for use in multi-stage receiver architectures | |||
| 52 | 6282411 | Mobile communication terminal device | |||
| 53 | 6282001 | Data access arrangement having improved transmit-receive separation | |||
| 54 | 6269093 | Adaptive removal of disturbance in TDMA acoustic peripheral devices | |||
| 55 | 6256511 | Dual-mode radio architecture | |||
| 56 | 6233227 | Transmitting and receiving apparatus | |||
| 57 | 6226275 | Wide band high power ultralinear RF transreceiver | |||
| 58 | 6219564 | Time base alignment for digital mobile phones | |||
| 59 | 6215988 | Dual band architectures for mobile stations | |||
| 60 | 6212172 | Filtering method to allow FDD and TDD operation in PCS transreceivers | |||
| 61 | 6208732 | Switched hybrid circuit for use with digital subscriber lines | |||
| 62 | 6192220 | Phase lock loop system with ultrafast lock times for half duplex time division multiple access wireless data applications | |||
| 63 | 6188274 | Bootstrap capacitor power supply for low voltage mobile communications power amplifier | |||
| 64 | 6175747 | Base transceiver station and subscriber unit in wireless local loop system using personal handy-phone system and method for operating same | |||
| 65 | 6172316 | Antenna switching device | |||
2000 | |||||
| 66 | 6163579 | Broadband modem transformer hybird | |||
| 67 | 6130897 | Time division multiple access FDD/TDD dual mode radio and a time division multiple access TDD dual band system | |||
| 68 | 6119023 | Digital portable telephone set having backlighted display with reduced power consumption | |||
| 69 | 6112061 | Radio communication device | |||
| 70 | 6111949 | Method of rapid automatic hybrid balancing | |||
| 71 | 6108312 | Method and apparatus for automatic activation of a clock master on a stackable repeater | |||
| 72 | 6104745 | Transceiver for performing time division full duplex spread spectrum communication | |||
| 73 | 6087039 | Accumulator device for an electrical and/or electronic apparatus and telecommunication terminal having such a device | |||
| 74 | 6067316 | Circuit for combined xDSL and other services | |||
| 75 | 6064857 | Dual mode satellite telephone with hybrid battery/capacitor power supply | |||
| 76 | 6049724 | Ultra-clean voltage power supply generator | |||
| 77 | 6014551 | Arrangement for transmitting and receiving radio frequency signal at two frequency bands | |||
| 78 | 6011323 | Apparatus, method and article of manufacture providing for auxiliary battery conservation in adapters | |||
1999 | |||||
| 79 | 6009316 | Receiver with an antenna switch, in which sensitivity and quality of reception is improved | |||
| 80 | 6006116 | Time-division radio that is powered by a low-power energy source | |||
| 81 | 5991606 | Apparatus for filtering signals of an antenna arrangement and a sender/receiver arrangement with two or more antennae | |||
| 82 | 5987309 | Transceiver circuits for TDMA system with variable frequency second local oscillator | |||
| 83 | 5982215 | Analog signal transmission circuit | |||
| 84 | 5974305 | Dual band architectures for mobile stations | |||
| 85 | 5974137 | AGC amplifier for two-wire line conditioner | |||
| 86 | 5963638 | Adjustable hybrid having improved biasing configuration | |||
| 87 | 5960346 | Apparatus and method for reducing magnetic fields in radio telephones | |||
| 88 | 5953412 | Method and apparatus for controlling line conditioner equalizer | |||
| 89 | 5923647 | Circulator usage in time division duplex radios | |||
| 90 | 5912924 | Bidirectional channels using common pins for transmit and receive paths | |||
| 91 | 5898907 | Radio transmitter-receiver adopting both a single frequency and a double frequency conversion | |||
| 92 | 5896420 | Transmission apparatus having echo cancellation facility | |||
| 93 | 5894473 | Multiple access communications system and method using code and time division | |||
| 94 | 5892393 | Power supply circuit having an auxiliary power source for compensating for main power drop | |||
| 95 | 5881373 | Muting a microphone in radiocommunication systems | |||
| 96 | 5864544 | TDD communication system which receives timing signals from a satellite and automatically, successively, repetitively, and alternatingly transmits and receives compressed signals in a single channel | |||
| 97 | 5862181 | Transmitting receiving apparatus | |||
1998 | |||||
| 98 | 5848062 | Wireless communication equipment for remote station | |||
| 99 | 5842115 | Time-duplex wireless telephone with improved hearing-aid compatibility | |||
| 100 | 5825827 | Dynamically compensated linear regulator for pulsed transmitters | |||
| 101 | 5802450 | Transmit sequencing | |||
| 102 | 5802447 | Transmitter-receiver for a radio communication apparatus | |||
| 103 | 5793754 | Two-way, two-wire analog/digital communication system | |||
| 104 | 5784690 | Transceiver measuring battery voltage when receiving in a TDMA system | |||
| 105 | 5771277 | Elevator car modem with transhybrid rejection | |||
| 106 | 5768690 | Radio communication device with improved antenna duplexing apparatus | |||
| 107 | 5764700 | Digital radio link system and radio link terminal | |||
| 108 | 5742417 | Data access arrangement having improved transmit-receive separation | |||
| 109 | 5734703 | Hybrid circuit and data communication apparatus | |||
| 110 | 5719856 | Transmitter/receiver interface apparatus and method for a bi-directional transmission path | |||
| 111 | 5717736 | Testing circuit and method for a codec hybrid balance network | |||
| 112 | 5715520 | Frequency offset method and apparatus for use in a transceiver | |||
| 113 | 5710811 | Speech circuit for subscriber telephone apparatus | |||
1997 | |||||
| 114 | 5701597 | Portable electronic device and method for supplying current to different loads | |||
| 115 | 5691978 | Self-cancelling full-duplex RF communication system | |||
| 116 | 5687169 | Full duplex ultrawide-band communication system and method | |||
| 117 | 5666302 | Simultaneous bidirectional transmission apparatus for transmitting and receiving differential signals | |||
| 118 | 5659886 | Digital mobile transceiver with phase adjusting strip lines connecting to a common antenna | |||
| 119 | 5657344 | Transmitting/receiving signal processing circuit in digital cordless telephone | |||
| 120 | 5648985 | Universal radio architecture for low-tier personal communication system | |||
| 121 | 5604768 | Frequency synchronized bidirectional radio system | |||
| 122 | 5603098 | Integrated radiating and coupling device for duplex communications | |||
| 123 | 5602912 | Telephone hybrid circuit | |||
| 124 | 5598405 | Time division multiple access time division duplex type transmitter-receiver | |||
1996 | |||||
| 125 | 5579336 | Bidirectional transreceiver for high speed data system | |||
| 126 | 5579144 | Data access arrangement having improved transmit-receive separation | |||
| 127 | 5553317 | Quadrature modulator for TDMA/TDD radio communication apparatus | |||
| 128 | 5546421 | Self compensating spread-spectrum hybrid | |||
| 129 | 5544159 | Duplex interconnect/dispatch trunked radio | |||
| 130 | 5539858 | Voice coding communication system and apparatus | |||
| 131 | 5528686 | Transformerless hybrid circuit having direct powered line-side amplifiers | |||
| 132 | 5528685 | Transformerless hybrid circuit | |||
| 133 | 5528683 | Method and circuit for implementing an impedance, in particular for DC telephonic applications | |||
| 134 | 5526425 | Interface circuit between a four wire line and a two wire line | |||
| 135 | 5524274 | Transceiver controlled by absence/presence of input signal | |||
| 136 | 5521947 | Phase detection reset in phase locked loops used for direct VCO modulation | |||
| 137 | 5519711 | Switch-mode power supply for time division multiple access radio phone systems | |||
| 138 | 5515364 | Radio frequency telecommunications transceiver | |||
| 139 | 5493705 | Transmission control circuit for use in TDMA communication devices | |||
| 140 | 5490167 | Duplex voice communication radio transmitter-receiver | |||
| 141 | 5483679 | Radio communication apparatus capable of isolating a receiver from a transmitter during a reception operation | |||
1995 | |||||
| 142 | 5479504 | Low voltage balanced hybrid circuit with operational amplifiers | |||
| 143 | 5477532 | Radio transceiver | |||
| 144 | 5473265 | Circuit configuration for the generation of a line terminating impedance | |||
| 145 | 5471187 | Data signal comparation with self-adjusting threshold | |||
| 146 | 5465298 | Solid state isolation device using opto-isolators | |||
| 147 | 5459787 | Circuit for the implementation of an impedance for a telephone speech circuit | |||
| 148 | 5457406 | Bidirectional signal transmission circuit and terminator | |||
| 149 | 5446770 | Time division duplex transceiver | |||
| 150 | 5444865 | Generating transmit injection from receiver first and second injections | |||
| 151 | 5436887 | Digital full-duplex transceiver | |||
| 152 | 5426697 | Duplex communication coupler system | |||
| 153 | 5423078 | Dual mode power amplifier for analog and digital cellular telephones | |||
| 154 | 5423075 | Combined radio transmission and reception apparatus with a PLL circuit | |||
| 155 | 5422950 | Remote terminal channel unit for telephone transmission lines | |||
| 156 | 5420886 | Digital transmission equipment | |||
| 157 | 5412688 | Process and circuit for detecting transmission using bi-directional differential links | |||
| 158 | 5408466 | Duplex interconnect dispatch trunked radio | |||
| 159 | 5387886 | Duplex filter operating as a change-over switch | |||
| 160 | 5379279 | Communication device with time assigned duplex operation | |||
1994 | |||||
| 161 | 5377232 | Frequency synchronized bidirectional radio system | |||
| 162 | 5355363 | Voice transmission method and apparatus in duplex radio system | |||
| 163 | 5347538 | Transceiver for bidirectional link, integrated circuit including the transceiver, and application to communication between units of a system | |||
| 164 | 5333194 | Autoequalizing bidirectional-to-unidirectional hybrid network | |||
| 165 | 5319799 | Signal oscillation method for time-division duplex radio transceiver and apparatus using the same | |||
| 166 | 5319635 | Electronic duplex communication system | |||
| 167 | 5309429 | Transmitter-receiver | |||
| 168 | 5305378 | Arrangement for adjusting an adaptive digital filter included in a subscriber unit | |||
| 169 | 5303417 | Mixer for direct conversion receiver | |||
| 170 | 5295186 | Termination circuit for a two-wire transmission line | |||
| 171 | 5287406 | Hybrid circuit having a two-wire/four-wire converting function | |||
| 172 | 5282157 | Input impedance derived from a transfer network | |||
| 173 | 5280644 | Frequency control circuit, and associated method, for a receiver operative to receive signals-transmitted thereto in intermittent bursts | |||
| 174 | 5280526 | Transformer-less hybrid circuit | |||
1993 | |||||
| 175 | 5271060 | Circuitry for interfacing telecommunications equipment to a communication channel | |||
| 176 | 5267233 | Radio set for an FDM-TDM-radio transmission set | |||
| 177 | 5255317 | Subscriber line interface circuit for serving ISDN subscribers using echo cancellers and POTS subscribers | |||
| 178 | 5253291 | Hybrid balance and combination codec filter circuit | |||
| 179 | 5253249 | Bidirectional transceiver for high speed data system | |||
| 180 | 5193223 | Power control circuitry for a TDMA radio frequency transmitter | |||
| 181 | 5187742 | Circuitry for interfacing telecommunications equipment to a communication channel | |||
1992 | |||||
| 182 | 5175763 | Two-wire/four-wire converter | |||
| 183 | 5172411 | Two-wire/four-wire converter | |||
| 184 | 5164985 | Passive universal communicator system | |||
| 185 | 5136575 | Cancelling circuit and transmission system | |||
| 186 | 5123008 | Single frequency time division duplex transceiver | |||
1991 | |||||
| 187 | 5043977 | Method and a circuit arrangement for setting the subscriber line dummy impedances of programmable hybrid circuits | |||
| 188 | 5034978 | Universal channel unit switchable between two wire and four wire configurations | |||
| 189 | 5007050 | Bidirectional digital serial interface for communication digital signals including digitized audio between microprocessor-based control and transceiver units of two-way radio communications equipment | |||
1990 | |||||
| 190 | 4949335 | A TDM quasi-duplex system | |||
| 191 | 4918725 | Terminal impedance setting circuit for a two-wire to four-wire converting circuit | |||
| 192 | 4914693 | Telephone subscriber circuit | |||
| 193 | 4908820 | Non-reciprocal bidirectional duplexer | |||
| 194 | 4903257 | Digital two-way radio-communication system using single frequency | |||
| 195 | 4897871 | Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line | |||
| 196 | 4894864 | Interface circuit | |||
1989 | |||||
| 197 | 4881262 | Electronic hybrid circuit | |||
| 198 | 4878244 | Electronic hybrid circuit | |||
| 199 | 4837522 | Noise reducer for microwave amplifier | |||
| 200 | 4807283 | Method for adjusting the balancing impedance of a hybrid junction | |||
| 201 | 4798982 | Active symmetrical balance hybrid circuit | |||
| 202 | 4796296 | PCM coder and decoder having function of two-wire/four-wire conversion | |||
1988 | |||||
| 203 | 4758822 | Bidirectional amplifier | |||
| 204 | 4757530 | Adaptive hybrid | |||
| 205 | 4756022 | Integrated circuit for the transmission of telephone signals | |||
| 206 | 4742540 | Circuit for switching between balanced networks | |||
| 207 | 4724441 | Transmit/receive module for phased array antenna system | |||
1987 | |||||
| 208 | 4715064 | Adaptive hybrid circuit | |||
| 209 | 4682356 | Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line | |||
| 210 | 4682350 | Equipment for wireless telephone transmission | |||
| 211 | 4677666 | Adaptive line hybrids | |||
| 212 | 4670870 | Adaptive cancellation bridge circuit | |||
| 213 | 4669115 | Hybrid circuit and method | |||
| 214 | 4644524 | Simultaneous communication system using time delays | |||
1986 | |||||
| 215 | 4630257 | Duplex speech transmission method and a system therefor | |||
| 216 | 4622442 | Electronic hybrid having synthesized impedance circuitry | |||
| 217 | 4622441 | Two-wire/four wire communication interface with noise rejection | |||
| 218 | 4610010 | Control circuit for an adaptive hybrid control in a local area network | |||
| 219 | 4602338 | Impedance measurement in 4-wire to 2-wire converters | |||
| 220 | 4598172 | Telecommunication terminal | |||
| 221 | 4595803 | Bidirectional amplifier | |||
| 222 | 4595802 | Hybrid circuit | |||
| 223 | 4590334 | Supply circuit included in a DC-magnetized hybrid transformer | |||
| 224 | 4573168 | Balanced bidirectional or party line transceiver accommodating common-mode offset voltage | |||
| 225 | 4567331 | Electronic hybrid having synthesized impedance circuitry | |||
1985 | |||||
| 226 | 4560843 | Electronic external line repeater | |||
| 227 | 4558185 | Subscriber line interface circuit with complex impedance | |||
| 228 | 4554416 | Low voltage two wire to four wire telephone circuit converter apparatus | |||
| 229 | 4540854 | Subscriber line interface circuit | |||
| 230 | 4539443 | Direct current magnetized hybrid transformer | |||
| 231 | 4525835 | Duplex radio system utilizing time compression expansion | |||
| 232 | 4520476 | Apparatus for enabling the duplex operation of a transmitter and receiver | |||
| 233 | 4501018 | Simplex transceiver employing a common piezoelectric element for transmitting and receiving | |||
| 234 | 4500755 | Electric hybrid circuits | |||
| 235 | 4498018 | Balancing impedance included in a fork | |||
| 236 | 4491700 | Hybrid circuit in a telephone subscriber interface circuit | |||
1984 | |||||
| 237 | 4485341 | Current limiter circuit | |||
| 238 | 4485277 | Apparatus for transmitting and/or receiving balanced signals on a two-wire telecommunication line | |||
| 239 | 4480327 | Single channel duplex communication system | |||
| 240 | 4475245 | Transceiver | |||
| 241 | 4449218 | Analog/digital telecommunication subscriber station | |||
| 242 | 4433215 | Solid state hybrid circuits | |||
| 243 | 4431874 | Balanced current multiplier circuit for a subscriber loop interface circuit | |||
| 244 | 4424499 | Equalizer circuit for a repeater | |||
1983 | |||||
| 245 | 4418249 | Four-wire terminating circuit | |||
| 246 | 4415777 | Hybrid circuit including capacitive charge-transfer means | |||
| 247 | 4411018 | Rapidly stabilized Gunn oscillator transceiver | |||
| 248 | 4398283 | Superhigh-frequency duplex mode telecommunications device | |||
| 249 | 4395599 | Driving point impedance derived from a transfer impedance | |||
| 250 | 4388500 | Electronic hybrid | |||
| 251 | 4387277 | Four wire to two wire converter | |||
| 252 | 4381561 | All digital LSI line circuit for analog lines | |||
| 253 | 4380690 | Hybrid circuit | |||
| 254 | 4380062 | Communication system providing simultaneous two-way transmission | |||
| 255 | 4378472 | Two to four wire hybrid circuit arrangement for a pulse code modulated time multiplex telecommunication system | |||
| 256 | 4377858 | Digital two-to-four wire converter for full duplex signals | |||
| 257 | 4377730 | Tone elimination circuit | |||
| 258 | 4375015 | Improved electronic hybrid circuit | |||
| 259 | 4368362 | Automatic telephone loaded/nonloaded facility type identification circuit | |||
| 260 | 4368361 | Automatically adjustable bidirectional-to-unidirectional transmission network | |||
1982 | |||||
| 261 | 4359609 | Circuit with feedback for controlling the impedance thereof | |||
| 262 | 4358644 | Bilateral current source for a multi-terminal intercom | |||
| 263 | 4358643 | Two to four wire hybrid circuit | |||
| 264 | 4357494 | Impedance canceller circuit | |||
| 265 | 4351060 | Automatic, digitally synthesized matching line terminating impedance | |||
| 266 | 4349919 | Transmitter/receivers capable of contemporaneous transmission/reception | |||
| 267 | 4348757 | Transceivers | |||
| 268 | 4346267 | Hybrid circuit | |||
| 269 | 4346266 | Hybrid circuit | |||
| 270 | 4331843 | Apparatus for controlling and indicating the integrity of the connection of telephone subscribers to a switching system | |||
| 271 | 4331842 | Voice frequency repeater and term sets and other circuits therefor | |||
| 272 | 4326109 | Apparatus for coupling a two-way transmission path to a one-way transmitting path and a one-way receiving path | |||
| 273 | 4322586 | Transformerless line interface circuit | |||
| 274 | 4321431 | Trunk circuit with single coupling transformer | |||
| 275 | 4320498 | Auto balancing duplexer for communication lines | |||
| 276 | 4319093 | Transmission bridge for a subscriber set | |||
| 277 | 4314196 | Current limiting circuit | |||
| 278 | 4313225 | Opto-isolator hybrid circuit | |||
1981 | |||||
| 279 | 4302636 | Subscriber's electronic line equipment comprising a two-wire-four-wire conversion circuit for a telephone exchange | |||
| 280 | 4301336 | Hybrid circuit | |||
| 281 | 4300023 | Hybrid circuit | |||
| 282 | 4297536 | Self-adjusting hybrid network | |||
| 283 | 4292479 | Separation and balance device for telephone exchanges | |||
| 284 | 4289939 | Longitudinal balance arrangements for two-to-four wire telecommunication line circuits | |||
| 285 | 4286114 | Two-wire resistance bridges for private line circuits | |||
| 286 | 4284859 | Adaptive electronic hybrid circuit | |||
| 287 | 4281219 | Telephone line circuit | |||
| 288 | 4278848 | Automatically adjustable bidirectional-to-unidirectional transmission network | |||
| 289 | 4278847 | Transformerless hybrid circuits | |||
| 290 | 4275276 | Automatically adjustable bidirectional-to-unidirectional transmission network | |||
| 291 | 4275270 | Speech detector for use in an adaptive hybrid circuit | |||
| 292 | 4272656 | Quasi-resistive battery feed for telephone circuits | |||
| 293 | 4271501 | Splitter/combiner network | |||
1980 | |||||
| 294 | 4238850 | Transmitter/receiver for single channel duplex communication system | |||
| 295 | 4217549 | Device for two-way information link | |||
| 296 | 4203012 | Hybrid circuit using current mirror circuits | |||
| 297 | 4203009 | Unbalanced/balanced converter circuits | |||
| 298 | 4192978 | Operational amplifier hybrid system | |||
| 299 | 4190747 | Signal corrected optocoupled device | |||
| 300 | 4182936 | Transformerless trunk circuit | |||
| 301 | 4181824 | Balancing impedance circuit | |||
1979 | |||||
| 302 | 4178485 | Transformerless telephone line circuit | |||
| 303 | 4174470 | Electronic hybrid | |||
| 304 | 4163878 | Electronic hybrid and hybrid repeater with bridge circuit | |||
| 305 | 4162447 | Frequency synthesis method for an AM-SSB transmitter-receiver | |||
| 306 | 4145657 | Radio transmission system for two subscribers to have a mutual connection on one of several frequency channels and having time multiplex interlace of preferred channels | |||
| 307 | 4142075 | Interface circuit and method for telephone extension lines | |||
| 308 | 4140875 | Four-wire, eight-leg bridge | |||
| 309 | 4134068 | Transmitter/receivers | |||
1978 | |||||
| 310 | 4127750 | Apparatus for transmitting and receiving pulses | |||
| 311 | 4113996 | Voltage controlled current sources for active hybrid circuit | |||
| 312 | 4103118 | Autobalance hybrid circuit | |||
| 313 | 4096362 | Automatic cable balancing network | |||
| 314 | 4086545 | Phase locked loop type transmitter receiver | |||
| 315 | 4086447 | Electronic hybrid circuit for connecting a two-wire line to switching system | |||
| 316 | 4074087 | Bidirectional voice frequency repeater | |||
| 317 | 4069454 | Transmitter-receiver employing automatic channel hunting and selection | |||
1977 | |||||
| 318 | 4064377 | Electronic hybrid and hybrid repeater | |||
| 319 | 4062016 | Simultaneous telecommunication between radio stations | |||
| 320 | 4053722 | Solid state two-wire/four-wire converter with common battery | |||
| 321 | 4048561 | Apparatus for preventing simultaneous transmission and channel selection in a transmitter or transceiver | |||
| 322 | 4041252 | Transformerless two-wire/four-wire hybrid with DC sourcing capability | |||
| 323 | 4039766 | Electric two-to-four wire conversion circuit for use in telephone systems | |||
| 324 | 4037158 | Two-way FM radio system operating on a single channel and providing simulated duplex operation | |||
| 325 | 4037065 | 20 Hz Ringdown solid state two-wire/four-wire converter | |||
| 326 | 4034295 | Radio communication system for simultaneous telecommunication between radio stations | |||
| 327 | 4034166 | Transmission networks for telephone system | |||
| 328 | 4004109 | Hybrid circuit | |||
| 329 | 4002860 | Transmitting and receiving apparatus | |||
| 330 | 4001524 | Apparatus for transmitting and receiving pulses | |||
1976 | |||||
| 331 | 3987257 | Optically coupled two-wire to four-wire hybrid lines | |||
| 332 | 3982080 | Automatic cable balancing network | |||
| 333 | 3973089 | Adaptive hybrid circuit | |||
| 334 | 3973088 | Wide-band hybrid network | |||
| 335 | 3970805 | Active hybrid circuit | |||
| 336 | 3946169 | Bilateral signal transmission system | |||
| 337 | 3942116 | Transceiver having improved voice actuated carrier and echo suppression circuit | |||
| 338 | 3939417 | Emergency communications system | |||
| 339 | 3934099 | Bias, feedback and network arrangements for hybrid circuits | |||
| 340 | 3932712 | Telephone transmission system | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||