| Patents for H04M 19 - Current supply arrangements for telephone systems (7,475) |
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| 07/25/1995 | US5436964 Programmable call progress tones for a switching system |
| 07/19/1995 | EP0663755A1 Circuit arrangement for feeding a subscriber line |
| 07/19/1995 | EP0663754A1 Device for activating data receiving in a telephone terminal capable of receiving data transmitted via the telephone line before off-hook |
| 07/13/1995 | WO1995019084A1 Clear channel selection system for a cordless telephone |
| 07/13/1995 | WO1995019083A2 Interface circuit |
| 07/13/1995 | DE4343836A1 Radio telephone with base and mobile handset units |
| 07/11/1995 | CA2040421C Method and apparatus for keyboard adaptation to a low power controller in a coin operated telephone |
| 07/05/1995 | EP0661865A1 Telecommunications apparatus |
| 07/05/1995 | EP0661864A1 Battery feed for telephone line cards |
| 07/05/1995 | EP0661758A2 Equipment adapted to use solar cell or device adapted to the equipment |
| 06/29/1995 | CA2136256A1 Battery feed for telephone line cards |
| 06/28/1995 | EP0659325A1 Cordless telephone system with different ringing patterns |
| 06/27/1995 | US5428682 Subscriber line interface circuit with reduced on-chip power dissipation |
| 06/27/1995 | US5428670 Communications marketing system |
| 06/27/1995 | US5428638 Method and apparatus for reducing power consumption in digital communications devices |
| 06/20/1995 | US5426695 Ringing signal control circuit capable of suppressing surge voltage |
| 06/20/1995 | US5426556 Extra protection module of an exchange |
| 06/20/1995 | CA2055014C Coupling device to be connected to a dce for the connection to a public switched telephone network having a local power supply circuit for allowing the use of the local telephone,dce and workstation including the same |
| 06/15/1995 | WO1995016328A1 Digital rural subscriber concentrator system |
| 06/15/1995 | CA2177582A1 Digital rural subscriber concentrator system |
| 06/14/1995 | EP0658031A1 Remote feeding circuit in communication systems |
| 06/13/1995 | US5425094 Telephone-related apparatus |
| 06/13/1995 | US5425079 Telephone power interruption data backup apparatus |
| 06/13/1995 | US5424710 Power coupler for coupling power from a transmission line to a node thereon |
| 06/11/1995 | CA2135856A1 Low power, addressable data communication device and method |
| 06/06/1995 | US5422948 Subscriber line interface for improving the frequency characteristics of the transmitted and received signals |
| 06/06/1995 | US5422656 Personal communicator having improved contrast control for a liquid crystal, touch sensitive display |
| 05/30/1995 | US5420919 Telephone line current modulator |
| 05/30/1995 | CA2042292C Impedance synthesis multiple loop using filtering means |
| 05/24/1995 | CN1102923A Method and apparatus for ringing telephone stations |
| 05/23/1995 | US5418841 Telephone answering machine with non-volatile memory |
| 05/23/1995 | CA2054012C Incoming call alert system for cellular telephones without wired connection thereto |
| 05/18/1995 | DE4338863A1 AC voltage generating circuitry for remotely fed electronic equipment |
| 05/17/1995 | EP0653136A1 Method and apparatus for providing power to a coaxial cable network |
| 05/17/1995 | CN2197778Y interface power supply of exchanging machine |
| 05/17/1995 | CN1102735A Circuit for applying direct current to winding |
| 05/16/1995 | US5416663 Arrangement for protecting telecommunications equipment from voltage transients |
| 05/11/1995 | WO1995012949A1 Personal apparatus for receiving radiotelephone communications |
| 05/09/1995 | US5414309 Circuit for applying direct current to winding |
| 04/27/1995 | WO1995011549A1 Direct-current impressing circuit |
| 04/19/1995 | EP0649242A1 Circuit for applying direct current to winding |
| 04/11/1995 | US5406623 Method and apparatus for ringing telephone stations |
| 04/04/1995 | US5404582 Aural annunciator circuit for a receiver |
| 04/04/1995 | US5404399 Telephone visual signaling device |
| 04/04/1995 | US5404391 Incoming call alert system for cellular telephones without wired connection thereto |
| 04/04/1995 | CA2044437C Digitally controlled ringer signal generation |
| 03/29/1995 | CN2193629Y D.C. distribution screen in use for communication system |
| 03/28/1995 | US5402485 Two-wire termination impedance generation circuit of subscriber circuit |
| 03/28/1995 | US5402484 Telephone circuit assembly |
| 03/28/1995 | US5402482 Ring trip deciding circuit |
| 03/28/1995 | US5402480 Call signal generating circuit |
| 03/28/1995 | CA2042786C Speakerphone state-controlled alerting arrangement |
| 03/23/1995 | WO1995008239A1 Power supply controller for an optical fibre telecommunications system |
| 03/23/1995 | WO1995008170A1 Voice activity detector |
| 03/16/1995 | DE4331320A1 Device for charging (charger) |
| 03/15/1995 | EP0643524A1 Power management for subscriber transmission system |
| 03/07/1995 | US5396555 Power and signal transmission system |
| 03/07/1995 | US5396548 Communication system utilizing information received during a silent interval between ringing signals |
| 03/07/1995 | US5396538 Contactless digital power transmission and reception system in a radio telephone |
| 03/02/1995 | DE4328971A1 Method for receiver-side detection of an AC signal voltage transmitted via a communication line |
| 03/01/1995 | EP0641113A1 Converter for identification with a protection circuit |
| 02/21/1995 | US5392347 Ringing tone signal detecting circuit |
| 02/16/1995 | WO1995005036A1 Method and apparatus for reducing power consumption in digital communications devices |
| 02/16/1995 | DE4326894A1 Circuit arrangement for ring tripping (turning off the ringing voltage) in an electronic subscriber circuit |
| 02/15/1995 | EP0639021A1 Circuit arrangement for a transformerless subscriber line interface circuit |
| 02/14/1995 | US5390249 Receiver device for receiving ringing signals in an off-hook line condition |
| 02/14/1995 | US5390231 Protection and recovery of telephone line interface circuits |
| 02/09/1995 | DE4326596A1 Protective circuit arrangement for electronic subscriber line interface circuits |
| 02/07/1995 | US5388150 Automatic incoming telephone call identification and disposition system |
| 02/01/1995 | EP0637161A1 Integrated subscriber line interface circuit with smooth polarity-reversal |
| 02/01/1995 | EP0636297A1 Subscriber line interface circuit with voltage controlled loop current. |
| 02/01/1995 | EP0636296A1 Impedance synthesizer for a subscriber line interface circuit. |
| 01/26/1995 | WO1995002936A1 Power coupler for coupling power from a transmission line to a node thereon |
| 01/24/1995 | US5384842 Programmable telephone |
| 01/19/1995 | WO1995002298A1 Front end processor employing data over voice communication with smart telephones |
| 01/19/1995 | CA2166690A1 Front end processor employing data over voice communication with smart telephones |
| 01/12/1995 | WO1995001692A1 Electronic device having internal charge regulator |
| 01/12/1995 | DE4321657A1 Method for identifying the answering signal of a called subscriber in telecommunications switching systems, in particular telephone switching systems |
| 01/11/1995 | EP0633683A2 Telephone system and information processing method with a telephone directory and a data communication function |
| 01/11/1995 | EP0632937A1 Dc/dc/ac power supply. |
| 01/10/1995 | US5381472 Power source control apparatus for telephone set |
| 01/10/1995 | CA2082153C Line interface circuit |
| 01/05/1995 | WO1995000999A1 Power supply system |
| 01/04/1995 | EP0632632A2 Subscriber circuit provided with a circuit for monitoring a subscriber instrument |
| 01/03/1995 | US5379032 Impulse transducer enunciator |
| 01/03/1995 | CA2022923C Hybrid circuit |
| 12/28/1994 | EP0630543A1 Circuitry for superimposing small, low energy signals and large, essentially higher energy signals. |
| 12/28/1994 | EP0630542A1 Hybrid fiber in the loop telephony system |
| 12/22/1994 | WO1994029997A1 Dial in-bound meter interface unit which derives its power from a telephone line |
| 12/21/1994 | EP0630143A1 Feeding circuit arrangement for digital telecommunication terminals |
| 12/21/1994 | EP0630140A2 Cordless telephone |
| 12/14/1994 | EP0628231A1 Telephone subscriber line circuit, components and methods. |
| 12/13/1994 | US5373554 Telephone having separate power circuit for supplying power to speech network |
| 12/08/1994 | WO1994028671A1 Method and apparatus for providing power to a coaxial cable network |
| 12/08/1994 | WO1994028667A1 Telephone power system |
| 12/07/1994 | CN1026940C A method and arrangement for supplying direct current to a telephone line |
| 12/06/1994 | US5371784 Remote auxilliary charging cradle for cordless telephone handset |
| 11/29/1994 | US5369698 Woodpecker simulating telephone ringing device |
| 11/29/1994 | US5369690 Telephone call detecting circuit and a method of remotely accessing and testing a telephone |
| 11/29/1994 | US5369687 Apparatus for electrically isolating a telephone line from a data device |