| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 09/29/1987 | US4697140 Semiconductor integrated circuit having a test circuit for testing an internal circuit |
| 09/29/1987 | CA1227586A1 Call progress for a computer telephone interface |
| 09/29/1987 | CA1227540A1 Method of transmitting terminating call signals within a restricted duration and a base station and a portable unit for use in the same |
| 09/24/1987 | DE3609732A1 Telephone set with keys |
| 09/24/1987 | DE3609490A1 Cylindrical holding body of elastic material |
| 09/24/1987 | DE3608348A1 Cable connection |
| 09/24/1987 | DE3608239A1 Telephone computer |
| 09/23/1987 | EP0238257A2 Integrated calling directory |
| 09/23/1987 | EP0238255A2 The personal computer - as an interface between a telephone station set and a business communication system |
| 09/23/1987 | EP0238039A2 Network event identifiers |
| 09/23/1987 | CN86210374U Self-put-through type internal telephone set |
| 09/22/1987 | US4696063 Optical fiber bandwidth limiting method |
| 09/22/1987 | US4696033 One-piece telephone hook switch operating mechanism |
| 09/22/1987 | US4696031 Signal detection and discrimination using waveform peak factor |
| 09/22/1987 | US4695804 Apparatus for generating a multi-frequency signal |
| 09/22/1987 | US4695692 Switch with pivoting clip-type contacts |
| 09/17/1987 | DE3608497A1 Method and device for voice-controlled operation of a telecommunications terminal |
| 09/17/1987 | DE3608238A1 Telephone computer |
| 09/17/1987 | DE3607684A1 Telephone set, for example series telephone set |
| 09/16/1987 | EP0237211A2 Packet buffer memory control for statistical multiplexing |
| 09/16/1987 | EP0236432A1 Optical fiber bandwidth limiting method. |
| 09/15/1987 | US4694486 Combined telephone-table system |
| 09/15/1987 | US4694485 Cordless telephone |
| 09/15/1987 | CA1226983A1 Audio transmission circuit comprising a transmit amplifier in the form of a line voltage stabiliser |
| 09/12/1987 | CN86201514U Numerically-controlled speaker-phone |
| 09/10/1987 | DE3607166A1 Device for the automatic recording of incoming calls for telephone sets |
| 09/09/1987 | EP0236180A1 Telephonic communication system with a portable hand set |
| 09/09/1987 | EP0235883A1 Telephone intercom device |
| 09/09/1987 | EP0235776A2 Telephone, especially car telephone |
| 09/09/1987 | EP0235127A1 Hands-free control system for a radiotelephone. |
| 09/08/1987 | US4692940 Telephone hook switch |
| 09/08/1987 | CA1226690A1 Telephone illumination circuit |
| 09/02/1987 | EP0234861A2 Packet generation apparatus and method |
| 09/02/1987 | EP0234860A2 Time stamping for packet system nodes |
| 09/02/1987 | EP0234859A2 Time stamp and packet virtual sequence numbering for reconstructing information signals from packets |
| 09/02/1987 | EP0234037A2 Telephone apparatus |
| 09/02/1987 | EP0233902A1 Telephone and demodulator |
| 09/02/1987 | EP0233892A1 A telephone line switch. |
| 09/02/1987 | EP0139657A4 Non-integer programmable counter. |
| 09/01/1987 | US4691339 Address code arrangements |
| 09/01/1987 | US4691338 Line switching circuit for cordless telephone |
| 09/01/1987 | US4691336 Telephone test set having an auxiliary amplifier and speaker for permitting listening to line signals |
| 09/01/1987 | CA1226356A1 Apparatus for testing telephone instruments |
| 08/27/1987 | WO1987005176A1 Apparatus for obtaining a high sound level and good sound reproduction from a loudspeaking telephone |
| 08/27/1987 | DE3606143A1 Circuit arrangement for connection lines of exchange and extension stations in the telephone network |
| 08/25/1987 | US4689814 External device interface for an electronic telephone |
| 08/25/1987 | US4689813 Speakerphone telephone answering machine |
| 08/25/1987 | US4689812 Cordless telephone |
| 08/25/1987 | US4689811 Call diverter function in an early care telephone system |
| 08/25/1987 | US4689506 Control circuit for use with electronic attenuators and method for providing a control signal proportional to absolute temperature |
| 08/20/1987 | DE3604491A1 Device with bistable relay |
| 08/18/1987 | CA1225762A1 Telephone hook switch with elastomeric contact member |
| 08/18/1987 | CA1225761A1 Cordless telephone |
| 08/18/1987 | CA1225727A1 Multifrequency tone distribution using a conferencing arrangement |
| 08/18/1987 | CA1225726A1 Method and apparatus for displaying at a selected station special service information during a silent interval between ringing |
| 08/12/1987 | EP0231290A1 Mobile telephone system |
| 08/11/1987 | US4686700 Telephone off-hook detector circuit |
| 08/11/1987 | US4686699 Call progress monitor for a computer telephone interface |
| 08/11/1987 | US4686697 Telephone care system with telephone line-checking |
| 08/05/1987 | EP0231108A2 Telephone dialling system |
| 08/05/1987 | EP0230607A2 Terminal apparatus for a telephone exchange |
| 08/04/1987 | US4685124 Microprocessor based control and switching device |
| 08/04/1987 | US4685121 Connecting and communication system and means for a telephone station with peripheral apparatus |
| 08/04/1987 | CA1225124A1 Adaptive line hybrids |
| 07/30/1987 | DE3601998A1 Mobile telephone case |
| 07/28/1987 | US4683585 Telephone hooking post and assembly |
| 07/28/1987 | US4683583 Method and apparatus for controlling telephone line access |
| 07/23/1987 | DE3608454C1 Dialling bar for a telephone device |
| 07/22/1987 | EP0229364A2 Telephone apparatus |
| 07/21/1987 | US4682368 Mobile radio data communication system using a speech recognition technique |
| 07/21/1987 | US4682357 Automobile telephone apparatus |
| 07/21/1987 | US4682351 Cordless Telephone system |
| 07/21/1987 | US4682350 Equipment for wireless telephone transmission |
| 07/21/1987 | US4682014 Simple data input apparatus |
| 07/16/1987 | WO1987004317A1 Portable radio transceiver housing structurally supported by an integral battery |
| 07/16/1987 | WO1987004312A1 Telephone intercom device |
| 07/16/1987 | WO1987004292A1 Method and apparatus for synthesizing speech from speech recognition templates |
| 07/16/1987 | DE3600864A1 Circuit arrangement with means for setting the correct polarity of a telephone connection line |
| 07/15/1987 | EP0228954A1 Telephone line interface option module |
| 07/15/1987 | EP0228439A1 Telephone line access control. |
| 07/15/1987 | CN86207182U Automatic switch for primary-secondary telephone set |
| 07/14/1987 | US4680790 Bedside control module for healthcare stations and the like |
| 07/14/1987 | US4680789 Audio transmission circuit comprising a transmit amplifier in the form of a line voltage stabilizer |
| 07/14/1987 | US4680787 Portable radiotelephone vehicular converter and remote handset |
| 07/14/1987 | US4680785 Personal-signaling communication system |
| 07/14/1987 | US4680783 Telephone security violation detection device |
| 07/14/1987 | CA1224293A1 Dtmf-telephone set with multiple use of the logic of the digital tone generator |
| 07/09/1987 | DE3617973C1 Dialling restriction for a telephone device in telephone systems with pulse or frequency dialling |
| 07/08/1987 | EP0228096A2 Signal detection and discrimination using waveform peak factor |
| 07/08/1987 | CN86206948U Electronic calling-communicating unit |
| 07/08/1987 | CN86106808A Telephone set equipped for amplified listening and with an anti-larsen device |
| 07/07/1987 | US4679244 Method of transmitting terminating call signals within a restricted duration and a base station and a portable unit for use in the same |
| 07/07/1987 | US4679234 Telephone cord twist restrainer |
| 07/07/1987 | US4679231 Telephone accessory housing |
| 07/07/1987 | US4679229 Ringing detection circuit |
| 07/07/1987 | US4679225 Signal transmission apparatus for a multiple channel system and method for using the same |
| 07/07/1987 | CA1223992A1 Transient resistant key operated pulse generating calling device circuit |
| 07/07/1987 | CA1223991A1 Master unlock circuit for a feature telephone station including a signaling lock circuit |
| 07/07/1987 | CA1223990A1 Portable telephone id code transfer system |
| 07/02/1987 | WO1987004031A1 A telephone guard |