| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 05/15/1984 | US4449017 ACD Combined handset and headset arrangement |
| 05/10/1984 | WO1984001870A1 Telephone system with computer generated dial pad and automatic dialling |
| 05/08/1984 | US4447676 Automatic dialer for telephone network access control |
| 05/08/1984 | US4447674 Electronic hold release circuit |
| 05/08/1984 | US4446708 Keyboard lock |
| 05/08/1984 | CA1167187A1 Automatic telephone answering device |
| 05/02/1984 | EP0107153A1 Connecting box for the connexion of a telephone apparatus and/or one or more additional sets |
| 05/01/1984 | US4446514 Multiple register digital processor system with shared and independent input and output interface |
| 05/01/1984 | US4446436 Circuit for generating analog signals |
| 05/01/1984 | US4446335 Telephone signal recording methods and apparatus |
| 05/01/1984 | US4446334 Telephone number coding device |
| 05/01/1984 | US4446333 Flexible acoustic coupler |
| 04/26/1984 | WO1984001678A1 Amplifier circuit |
| 04/25/1984 | EP0106476A1 Telephone apparatus |
| 04/25/1984 | EP0106400A1 System identification in communications systems |
| 04/25/1984 | EP0106318A2 Telephone apparatus with optical indicators |
| 04/25/1984 | EP0106079A2 Surge protection for signal transmission systems |
| 04/24/1984 | US4445148 Automatic telephone answering apparatus |
| 04/24/1984 | US4445008 Communication housing |
| 04/24/1984 | US4445003 Improved connection arrangement for connecting series and shunt utilization circuit to a communications channel |
| 04/24/1984 | US4445002 Sidetone circuit |
| 04/24/1984 | US4445001 Circuit arrangement for identifying telephone subscribers |
| 04/24/1984 | US4445000 Automatic telephone answering apparatus |
| 04/24/1984 | US4444999 Automatic electronic disconnector for subscriber terminal equipment |
| 04/18/1984 | EP0105441A1 Telephone switching system for public or private telephone networks with at least one central dial information recording and processing device |
| 04/17/1984 | US4443665 Privacy and hold circuit for telephone |
| 04/17/1984 | US4443664 Telephone station incorporating exchange message system |
| 04/12/1984 | WO1984001481A1 Telephone extension system |
| 04/10/1984 | US4442325 Switchable incremental attenuation for telephone line interface |
| 04/10/1984 | US4442322 Electronic common switch having an improved receiver mating arrangement |
| 04/10/1984 | US4442318 Portable bi-directional data communication terminal |
| 04/04/1984 | EP0104709A2 Portable device including manual operation via a plurality of keys |
| 04/03/1984 | US4440981 Electronic hold circuit |
| 04/03/1984 | CA1165029A1 Subscriber line audio processing circuit apparatus |
| 04/03/1984 | CA1165027A1 Telephone set |
| 03/27/1984 | US4439645 Sound attenuating earcup assembly with outside communication capability |
| 03/27/1984 | US4439638 Sound-activated code-controlled detection system for telephones and the like |
| 03/27/1984 | US4439637 In a telephone subscriber's device |
| 03/27/1984 | CA1164151A1 Support for helmets in general provided with microtelephone |
| 03/26/1984 | EP0084562A4 Multi-tone signal generator. |
| 03/21/1984 | EP0103324A2 Simultaneous voice and data transmission circuit having a digital loop transceiver |
| 03/21/1984 | EP0102946A1 Gain regulation circuit. |
| 03/21/1984 | EP0102945A1 Waveform clipping circuits |
| 03/20/1984 | US4438527 Signal responsive automatic control for audio equipment |
| 03/20/1984 | US4438300 Protective cover for telephone push button array |
| 03/15/1984 | WO1984001044A1 Multiple simultaneous tone decoder |
| 03/14/1984 | EP0102660A2 Telephone circuit |
| 03/13/1984 | US4436967 Telephone lock |
| 03/13/1984 | US4436965 Sealing means for telephone cover device |
| 03/13/1984 | US4436964 Hookswitch mechanism for telephone instrument |
| 03/13/1984 | US4436959 Automatic telephone answering device |
| 03/13/1984 | US4436957 Telephone security system for cordless telephony |
| 03/07/1984 | EP0102111A2 Telephone circuit |
| 03/06/1984 | US4435623 Telephone guard device |
| 03/06/1984 | US4435622 Latching relay hold circuit for a telephone instrument |
| 03/06/1984 | CA1163390A1 Voltage stabiliser suitable for use in a telephone set |
| 03/06/1984 | CA1163389A1 Voltage stabiliser suitable for a telephone set |
| 03/06/1984 | CA1163388A1 Line interruption arrangement |
| 03/06/1984 | CA1163387A1 Circuit for use in a telephone set |
| 02/28/1984 | US4434326 Circuit arrangement for establishing and terminating a data connection |
| 02/21/1984 | US4433216 Faceplate assembly for telecommunications terminals and other terminals |
| 02/21/1984 | US4432522 Portable telephone support |
| 02/14/1984 | US4431872 Telecommunication receivers |
| 02/14/1984 | US4431870 Telephone system with computer generated dial pad and automatic dialing |
| 02/14/1984 | CA1162337A1 Digital tone ringer |
| 02/08/1984 | EP0100084A2 Telephone with a video screen |
| 02/07/1984 | US4430528 Telephone call counter |
| 02/02/1984 | WO1984000455A1 Equipment for wireless telephone transmission |
| 02/01/1984 | EP0099761A2 Junction circuit for coupling an additional line to an intercommunication set |
| 01/31/1984 | US4429188 Telephone call screener |
| 01/31/1984 | CA1161519A1 Faceplate assembly for telecommunications terminals and other terminals |
| 01/25/1984 | EP0099272A2 Loop circuit for a telephone line |
| 01/25/1984 | EP0098828A1 Circuit for detecting loss of supply voltage |
| 01/24/1984 | US4427848 Telephonic alphanumeric data transmission system |
| 01/17/1984 | US4426555 Telephone communications device for hearing-impaired person |
| 01/17/1984 | US4426554 Tape drive transfer system for cassette telephone answering device with remote controlled playout |
| 01/17/1984 | CA1160783A1 Electronic lock, switching, and hold devices for telephones |
| 01/17/1984 | CA1160782A1 Telephone handsets |
| 01/11/1984 | EP0098201A2 Universal telephone set with personalized push-buttons |
| 01/11/1984 | EP0097718A1 Telephone hook switch |
| 01/11/1984 | EP0097710A1 Telephonic alphanumeric data transmission system. |
| 01/10/1984 | US4425627 Intelligent prompting terminal apparatus |
| 01/10/1984 | US4425480 Telephone station apparatus with selective restricting of local calls |
| 01/10/1984 | US4425477 Telephone line triggered attenuator |
| 01/10/1984 | US4424880 Acoustic device for a head protector |
| 01/03/1984 | US4424420 Pivotal switch operating mechanism |
| 01/03/1984 | CA1159974A1 Electronically-switched multifrequency generator with transducer control |
| 12/22/1983 | WO1983004462A1 A cordless key telephone system employing infrared transmission |
| 12/21/1983 | EP0096409A1 Digital telecommunications terminal, especially a telephone subscriber station |
| 12/20/1983 | US4421954 Automatic telephone answering and message recording device |
| 12/20/1983 | CA1159172A1 Television receiver with two-way telephone conversation capability |
| 12/13/1983 | US4420657 Adjustable headset |
| 12/13/1983 | US4420656 Interactive telephone answering system |
| 12/08/1983 | WO1983004357A1 Combined handset and headset arrangement |
| 12/07/1983 | EP0095768A2 Remote control system |
| 12/06/1983 | US4419543 Tone activated hold circuit |
| 11/29/1983 | US4418249 Four-wire terminating circuit |
| 11/15/1983 | US4415778 Subscriber telephone test set |
| 11/15/1983 | US4415776 Telephone music-on-hold device |
| 11/15/1983 | US4415769 Electromagnetic telephone coupling device |