| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
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| 04/08/1992 | CN1060185A Noise eliminating element and electrical circuit having same |
| 04/07/1992 | US5103448 Simultaneous ringing control in the time division duplex telecommunications system |
| 04/07/1992 | CA1298677C Semiconductor integrated circuit for telephone |
| 04/07/1992 | CA1298676C Hybrid alphanumeric telephone directory |
| 04/07/1992 | CA1298662C Speech recognition system with an accurate recognition function |
| 04/07/1992 | CA1298628C Amplifier circuit |
| 04/02/1992 | WO1992005538A1 Noise cancelling systems |
| 04/01/1992 | EP0478213A2 Cordless communication system |
| 04/01/1992 | EP0478141A2 Keypad status reporting system |
| 04/01/1992 | EP0478140A2 Keypad monitor |
| 04/01/1992 | EP0478129A2 Apparatus for facilitating communications |
| 04/01/1992 | EP0478126A2 Microprocessor to external device serial bus communication system |
| 04/01/1992 | EP0478125A2 Discriminating information from noise in a communication signal |
| 04/01/1992 | EP0477854A2 Speed dialling method for a telephone unit |
| 04/01/1992 | EP0477688A2 Voice recognition telephone dialing |
| 04/01/1992 | CN1060001A Alarm and test system for digital added main line |
| 03/31/1992 | US5101503 Method of connecting channels of decentralized radio systems |
| 03/31/1992 | US5101429 Electronic telephone set |
| 03/31/1992 | US5101426 Telephone answering device with improved end signal detection |
| 03/31/1992 | US5101418 Digital time-multiplexed quadrature frequency upconverter |
| 03/31/1992 | US5101178 Crystal oscillator having frequency adjustment responsive to power supply voltage |
| 03/31/1992 | US5099768 Swivel table |
| 03/29/1992 | CA2026511A1 Telephone handsets |
| 03/28/1992 | WO1992006550A1 Telecommunication display system |
| 03/28/1992 | CA2091259A1 Telecommunication display system |
| 03/27/1992 | CA2052247A1 Communication system |
| 03/25/1992 | EP0476755A2 Subscriber set for an integrated services digital network (ISDN) |
| 03/25/1992 | EP0476525A2 Automatic line defect detector |
| 03/25/1992 | EP0476390A2 Mobile transceiver with anti-theft function |
| 03/24/1992 | US5099519 Headphones |
| 03/24/1992 | US5099515 Secrecy device for wiretapping prevention and detection |
| 03/24/1992 | US5099514 Multi-purpose telephone accessory unit |
| 03/24/1992 | US5099513 Integrated circuit for generating a melody and ring |
| 03/24/1992 | US5099512 Communication terminal device |
| 03/24/1992 | US5099508 Radio telephone system for selectively allowing a party in communication with a system user to transmit a voice signal to the user during a hold state |
| 03/24/1992 | US5099507 Auto-dialing apparatus and auto-dialing type paging receiver including improved calling functions |
| 03/24/1992 | US5098128 Computer monitor pad holder |
| 03/19/1992 | WO1992005649A1 Cellular telephone recording adaptor |
| 03/19/1992 | WO1992004798A1 Method and apparatus for selective transfer of calls in personal communicators |
| 03/19/1992 | WO1992004795A1 Dtmf signal detection apparatus for a voice store and forward equipment |
| 03/19/1992 | WO1992004794A2 Alarm and test system for a digital main line |
| 03/19/1992 | CA2069006A1 Cellular telephone recording adaptor |
| 03/18/1992 | EP0475298A1 Apparatus for displaying time-of-day data adaptively to different time zones |
| 03/18/1992 | EP0475091A2 Holding device |
| 03/18/1992 | EP0387338A4 Method and apparatus for controlling transmission of voice and data signals |
| 03/18/1992 | CN2099418U Improved signal bell of telephone |
| 03/18/1992 | CN2099417U Disinfecting equipment for telephones |
| 03/18/1992 | CN1059629A Active repeating telephone set |
| 03/17/1992 | US5097502 Telephone with speed dial and recording of remotely transmitted numbers |
| 03/17/1992 | US5097500 Radio telephone system which writes an identification code via radio link when units are electrically connected |
| 03/17/1992 | US5096439 Wall plate having jack-release slots |
| 03/17/1992 | CA1297578C Modular microphone assembly |
| 03/17/1992 | CA1297565C Call screening in a public telephone station |
| 03/11/1992 | WO1992004782A1 Radio telephone system supporting busy and out-of-range functions |
| 03/11/1992 | EP0474555A2 Multi-media communication apparatus |
| 03/11/1992 | EP0474172A2 Telephone line monitoring apparatus and method |
| 03/11/1992 | EP0165294B1 Portable telephone id code transfer system |
| 03/11/1992 | CN2098769U Multifunctional automatic switching device for bridging telephone |
| 03/11/1992 | CN2098768U Mouthpiece handle of telephone |
| 03/10/1992 | US5095503 Cellular telephone controller with synthesized voice feedback for directory number confirmation and call status |
| 03/10/1992 | US5095308 Transceiver with battery saver and method of using same |
| 03/10/1992 | US5094396 Retractable reel assembly for telephone extension cord |
| 03/10/1992 | CA1297201C Method and apparatus for automatically selecting system commands fordisplay |
| 03/07/1992 | WO1992004792A1 Noise-cancelling handset |
| 03/05/1992 | WO1992003882A1 Dialing editing method and apparatus |
| 03/04/1992 | EP0473465A1 Power saving arrangement and method in portable cellular telephone system |
| 03/04/1992 | EP0473402A2 Foldable portable telephone |
| 03/04/1992 | EP0473381A2 Apparatus and method for securing an armoured cord and restraint cable assembly to a telephone handset and housing |
| 03/04/1992 | EP0473187A2 A battery alarm system |
| 03/04/1992 | EP0472719A1 Automatic area code dialing apparatus and methods particularly adapted for cellular or other types of telephone systems |
| 03/04/1992 | EP0228439B1 Telephone line access control |
| 03/04/1992 | EP0204718B1 Full duplex speakerphone for radio and landline telephones |
| 03/04/1992 | CN1059244A Chronometric and counting device for telephone set |
| 03/03/1992 | US5093857 Communication apparatus for selected data and speech communication |
| 03/03/1992 | US5093856 Apparatus and method for determining incoming call destination with improved security |
| 03/03/1992 | US5093855 Method for speaker recognition in a telephone switching system |
| 03/03/1992 | US5093854 Phone actuated calendar |
| 03/03/1992 | US5092785 Telecommunication jack box |
| 03/03/1992 | CA1296774C Portable radiotelephone with control switch disabling |
| 03/03/1992 | CA1296771C Communication system with tandem scrambling devices |
| 02/28/1992 | CA2043118A1 Power saving arrangement and method in portable cellular telephone system |
| 02/26/1992 | EP0472361A2 Portable personal workstation |
| 02/26/1992 | EP0472289A2 Speakerphone state-controlled alerting arrangement |
| 02/26/1992 | EP0472044A2 Handset for radio-telephone with information storage while absent |
| 02/26/1992 | EP0471877A1 Digital telephone device |
| 02/26/1992 | CN2097485U Adapter junction box of telephone for secrecy |
| 02/26/1992 | CN2097483U Simple mechanical bell for telephone |
| 02/26/1992 | CN2097482U Multi-azimuth dial telephone |
| 02/25/1992 | US5091941 Secure voice data transmission system |
| 02/25/1992 | US5091934 Tone modification system for telephone system with clock |
| 02/25/1992 | US5091933 Multiple party telephone control system |
| 02/25/1992 | CA1296166C Telephone structure |
| 02/24/1992 | CA2023834A1 Telephone line blocking apparatus |
| 02/20/1992 | WO1992003003A1 Electrical apparatus for simulating functions of a complex switching device |
| 02/20/1992 | DE4026180A1 Telephone installation for main line or PBX working - has console with cradles for cordless and cord-connected handsets |
| 02/20/1992 | DE4026179A1 Message transmission system for mobile telephony - has memories for call criteria which are transmitted from base station to originators of calls from mobile stations to their counterparts |
| 02/20/1992 | DE4023318A1 Verfahren zur durchfuehrung eines variablen dialogs mit technischen geraeten Method for performing a variable dialogs with technical equipment |
| 02/19/1992 | EP0471537A2 Data communication apparatus |
| 02/19/1992 | EP0471448A2 Programmable keyboard monitor |
| 02/19/1992 | CN1058867A Private telephone automatic calling receiving method and equipment |