СПИСОК патентов США - подгруппа МПК16 H04M3/40
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| № п/п | Номер патента | Название патента | |||
2015 | |||||
| 1 | 9160843 | Speech signal processing to improve naturalness | |||
2006 | |||||
| 2 | 7127240 | Method for selective mid-call call forwarding from mobile station | |||
| 3 | 6987851 | Method and apparatus for a high efficiency line driver | |||
2004 | |||||
| 4 | 6807262 | Central office control of receive and transmit handset volume | |||
| 5 | 6792098 | Inter-network line level adjustment method and system | |||
2003 | |||||
| 6 | 6594359 | Circuit for eliminating echo and side tones in a switching system | |||
| 7 | 6584176 | Loop loss measurement and reporting mechanism for digital data services telephone channel equipment | |||
2002 | |||||
| 8 | 6453153 | Employing customer premises equipment in communications network maintenance | |||
| 9 | 6453043 | Flash-cut of speech processing features in a telephone call | |||
| 10 | 6438131 | Low-overhead service specific convergence layer for voice and telephony over packet-based systems | |||
| 11 | 6404872 | Method and apparatus for altering a speech signal during a telephone call | |||
| 12 | 6381249 | Tandem pass through in a switched call | |||
2001 | |||||
| 13 | 6256377 | Loop loss measurement and reporting mechanism for digital data services telephone channel equipment | |||
| 14 | 6243454 | Network-based caller speech muting | |||
| 15 | 6178237 | Teleconferencing audio bridge | |||
2000 | |||||
| 16 | 6128369 | Employing customer premises equipment in communications network maintenance | |||
| 17 | 6078507 | Patch panel with incorporated distribution amplifiers | |||
| 18 | 6052441 | Voice response service apparatus | |||
| 19 | 6044147 | Telecommunications system | |||
| 20 | 6021194 | Flash-cut of speech processing features in a telephone call | |||
1999 | |||||
| 21 | 6006189 | Method and apparatus for storing and forwarding voice signals | |||
| 22 | 5991645 | Wireless telephone headset system with automatic log on/log off detection | |||
| 23 | 5949854 | Voice response service apparatus | |||
| 24 | 5943413 | Method for selectively routing enhanced calls | |||
| 25 | 5926543 | Headset amplifier with automatic log on/log off detection | |||
| 26 | 5898675 | Volume control arrangement for compressed information signals | |||
| 27 | 5864615 | Audio communications inferface, method and communications system for connecting a remote agent to a telephone switch | |||
| 28 | 5859908 | Method and apparatus for applying multiple speech processing features to a telephone call | |||
1998 | |||||
| 29 | 5802164 | Systems and methods for controlling telephone sound enhancement on a per call basis | |||
| 30 | 5781883 | Method for real-time reduction of voice telecommunications noise not measurable at its source | |||
| 31 | 5768308 | System for TDMA mobile-to-mobile VSELP codec bypass | |||
| 32 | 5737389 | Technique for determining a compression ratio for use in processing audio signals within a telecommunications system | |||
| 33 | 5727031 | Adaptive gain controller | |||
| 34 | 5724416 | Normalization of calling party sound levels on a conference bridge | |||
| 35 | 5712954 | System and method for monitoring audio power level of agent speech in a telephonic switch | |||
| 36 | 5708754 | Method for real-time reduction of voice telecommunications noise not measurable at its source | |||
| 37 | 5706394 | Telecommunications speech signal improvement by reduction of residual noise | |||
1997 | |||||
| 38 | 5652712 | Method and apparatus for calibration of digital test equipment | |||
| 39 | 5642428 | Method and apparatus for determining playback volume in a messaging system | |||
| 40 | 5642415 | Modular attenuator | |||
| 41 | 5640433 | Conversion of synchronous/asynchronous signals | |||
| 42 | 5627827 | Automatic service cutover for ISDN private exchange | |||
| 43 | 5625687 | Arrangement for enhancing the processing of speech signals in digital speech interpolation equipment | |||
| 44 | 5621731 | Private exchange for ISDN | |||
| 45 | 5592545 | Voice enhancement system and method | |||
1996 | |||||
| 46 | 5539806 | Method for customer selection of telephone sound enhancement | |||
| 47 | 5524148 | Background noise compensation in a telephone network | |||
| 48 | 5521919 | Method and apparatus for providing switch-based features | |||
| 49 | 5495529 | Digital sound level control apparatus | |||
| 50 | 5488657 | Apparatus for and method of operating an automatic log on/log off circuit in a telephone system by disconnecting a headset | |||
| 51 | 5487102 | Voice interface board for use in an operator system | |||
| 52 | 5485515 | Background noise compensation in a telephone network | |||
1995 | |||||
| 53 | 5473666 | Method and apparatus for digitally controlling gain in a talking path | |||
| 54 | 5471527 | Voice enhancement system and method | |||
| 55 | 5467395 | Telephone exchange apparatus | |||
| 56 | 5422950 | Remote terminal channel unit for telephone transmission lines | |||
| 57 | 5396553 | Automatic loss control circuit | |||
1994 | |||||
| 58 | 5377231 | Automatic gain control circuit for a digital baseband line equalizer | |||
| 59 | 5363441 | Technique for reducing echoes in conference communications | |||
| 60 | 5357569 | Trans-hybrid loss compensator for on hook transmission | |||
| 61 | 5347544 | Gain or loss compensation circuit for telephone lines | |||
| 62 | 5333195 | Telephone network speech signal enhancement | |||
| 63 | 5280525 | Adaptive frequency dependent compensation for telecommunications channels | |||
1993 | |||||
| 64 | 5226077 | Headset amplifier with automatic log on/log off detection | |||
| 65 | 5212722 | Hands-free telephone having a handset volume attenuator for controlling speaker volume in a hands-free adaptor | |||
| 66 | 5206902 | Network signaling arrangement for controlling tandem network functions | |||
| 67 | 5195132 | Telephone network speech signal enhancement | |||
1992 | |||||
| 68 | 5119365 | Bi-directional buffer line amplifier | |||
1991 | |||||
| 69 | 5070524 | Telephone system | |||
1990 | |||||
| 70 | 4980908 | Voice-switched gain control for voice communication equipment connected to telephone lines | |||
1989 | |||||
| 71 | 4847885 | System for measuring and automatically compensating for the distorsions of a connection between a telephone apparatus and a central voice processing unit | |||
| 72 | 4831651 | Intermediate amplifier for use in two-wire connections of a dial telephone network and method for the gain control of said amplifier | |||
1988 | |||||
| 73 | 4758822 | Bidirectional amplifier | |||
1987 | |||||
| 74 | 4679228 | Speakerphone sensing circuit | |||
1986 | |||||
| 75 | 4600816 | Attenuator adapted for clip mounting to connecting block terminals | |||
1982 | |||||
| 76 | 4320257 | Compensation of transmission losses in a telephone system | |||
1981 | |||||
| 77 | 4281219 | Telephone line circuit | |||
| 78 | 4278843 | Two-way amplifier arrangement | |||
| 79 | 4277655 | Automatic gain repeater | |||
1980 | |||||
| 80 | 4215251 | Switching apparatus selectively utilizing a regenerative repeater | |||
1978 | |||||
| 81 | 4085290 | Telephone conference amplifier | |||
1977 | |||||
| 82 | 4045615 | Monobus interface circuit using opto-coupled hybrids | |||
| 83 | 4013956 | Telecommunication system with automatically switched modems | |||
| © 2017, ПАТ-Инфо, В.И. Карнышев
Дата формирования списка: 03.04.2017 | |||||