| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 05/18/1982 | US4330692 Telephone attachment for supporting a book or the like above the telephone |
| 05/18/1982 | CA1123979A1 Vandal resistant public telephone |
| 05/13/1982 | WO1982001632A1 A fastening arrangement for holding together the two sections of a telephone handset casing |
| 05/12/1982 | EP0051383A1 Apparatus and method for a telephone alarm system |
| 05/11/1982 | US4329548 Telephone sterilizer apparatus |
| 05/11/1982 | US4329546 Interface unit for pushbutton selector |
| 05/11/1982 | US4329541 Dialing system for teleprinter |
| 05/05/1982 | EP0050899A1 Device for the transmission and receipt of signals through a telephone line |
| 05/05/1982 | EP0050748A1 Analog-/digital subscriber's station |
| 05/05/1982 | EP0050732A1 Transmitter with dial or identification number storage |
| 05/04/1982 | US4328399 Pushbutton switch assembly for telecommunications and other input |
| 04/27/1982 | US4327255 Keypad caller for a telephone set |
| 04/27/1982 | US4327254 Ringer circuit for telephone |
| 04/27/1982 | US4326689 Mount for a housing which is releasably fastened to a wall |
| 04/27/1982 | CA1122694A1 Telephone transducer assembly and method of making same |
| 04/20/1982 | US4326298 Arrangement for signaling in a voice communication system with optically fed components |
| 04/20/1982 | US4326108 Hook switch for telephone instruments |
| 04/20/1982 | US4326106 Telephone amplifier circuit |
| 04/20/1982 | US4326102 Audio data transmission device with coupling device |
| 04/14/1982 | EP0049332A1 Key for dialing without picking up the handset and for loudspeaker reception |
| 04/13/1982 | US4325137 Power supply system to terminal equipment through an optical fiber cable |
| 04/13/1982 | US4324954 Dialing circuits and methods for electronic telephone sets |
| 04/06/1982 | US4323739 Telephone locking device |
| 03/31/1982 | EP0048566A1 Telephone circuit |
| 03/30/1982 | US4322585 Personal electronic listening system with an air and bone transducer mounted on the clothing collar |
| 03/30/1982 | US4322582 Liquid-sealed type of a governor for telephone dial |
| 03/24/1982 | EP0047782A1 Memory accessing system |
| 03/23/1982 | CA1120623A1 Device for supplying and withdrawing telephonic cord |
| 03/23/1982 | CA1120593A1 Methods of generating electric signals and apparatus therefor |
| 03/16/1982 | US4320262 Telephone handset with integral shoulder rest |
| 03/16/1982 | US4320256 Verbally interactive telephone interrogation system with selectible variable decision tree |
| 03/10/1982 | EP0046770A1 Electronic repertory |
| 03/09/1982 | US4319097 Mounting system for a mobile microphone |
| 03/09/1982 | US4319095 Telephone handset transducer mounting |
| 03/09/1982 | US4319089 Telephone answering machine |
| 03/02/1982 | US4317964 Off-hook/on-hook status check circuit |
| 03/02/1982 | US4317959 Speech control circuit |
| 03/02/1982 | CA1119328A1 Telephone toll restrictor |
| 02/23/1982 | US4317234 Telephone subscriber station |
| 02/23/1982 | US4317233 Telephone subscriber station |
| 02/23/1982 | CA1118923A1 Telephone set with loudspeaker |
| 02/17/1982 | EP0045941A1 Dialling method for establishing a connection in a telephone switching system with digital speech transmission |
| 02/10/1982 | EP0045539A2 Telephone bell assembly |
| 02/09/1982 | US4315108 Integrated circuit chip telephone communication system |
| 02/09/1982 | US4315107 Telephone range extender with gain |
| 02/09/1982 | US4315104 Automatically reset control mechanism for remote playout telephone answering device |
| 02/09/1982 | CA1118126A1 Telephone set arrangement |
| 02/04/1982 | WO1982000392A1 Automatic dialing device |
| 02/03/1982 | EP0044918A1 Circuit for establishing and cleaning a data connection |
| 02/03/1982 | EP0044863A1 Audio data transmission device |
| 02/02/1982 | US4314109 Synchronization system for key telephone system |
| 02/02/1982 | US4314108 Key set toll restrictor |
| 02/02/1982 | US4314107 Subscriber station networks |
| 02/02/1982 | US4314103 Telephone answering system with simulated dial tone disconnect protection |
| 02/02/1982 | US4314099 Fluid-insulated universal flexible acoustic coupler muff system |
| 02/02/1982 | US4313623 Book holder |
| 01/26/1982 | US4313225 Opto-isolator hybrid circuit |
| 01/26/1982 | US4313037 Telephone station set with improved flash signalling |
| 01/21/1982 | WO1982000231A1 Tone generator circuit |
| 01/19/1982 | US4311883 Modular telephone jack lock |
| 01/19/1982 | US4311875 Interface system isolating a subscriber subset from a telephone switching system |
| 01/12/1982 | US4310732 Sound powered headset |
| 01/12/1982 | US4310729 Selector switch with common actuator both for circuit selection and for selection indication |
| 01/05/1982 | US4309574 Electronic tone ringer |
| 01/05/1982 | US4309573 Loudspeaking substation circuit |
| 01/05/1982 | CA1115870A1 Lockable covering apparatus for telephone dials |
| 12/29/1981 | US4308432 Auxiliary cradle holding device for a telephone |
| 12/29/1981 | CA1115408A1 Telephone handset acoustic coupling cup |
| 12/24/1981 | WO1981003728A1 Subscriber line audio processing circuit apparatus |
| 12/22/1981 | US4307266 Communication apparatus for the handicapped |
| 12/15/1981 | US4306190 Plural frequency signal generator |
| 12/15/1981 | US4306119 Telephone outpulsing circuit |
| 12/15/1981 | US4306117 Remote recording of new outgoing announcement in a telephone answering device |
| 12/15/1981 | CA1114470A1 Multi-outlet adapter for modular telephone cords |
| 12/09/1981 | EP0041195A1 Improved paging arrangement |
| 12/08/1981 | US4304971 Push-button telephone locking device |
| 12/08/1981 | US4304969 Power circuit for loudspeaker telephone |
| 12/08/1981 | US4304968 Telephone electronic answering device |
| 12/02/1981 | EP0040785A1 Transformerless hybrid circuit |
| 12/01/1981 | US4303805 Subscriber station network |
| 11/24/1981 | US4302630 Telephonic answering device |
| 11/17/1981 | CA1112744A1 Audio teleconferencing |
| 11/04/1981 | EP0039109A1 Protective device against the Larsen effect in a loudspeaking telephone apparatus |
| 11/04/1981 | EP0039084A2 Apparatus to enter a series of figures into a terminal for the operation of devices with digital control |
| 11/03/1981 | US4298775 Microprocessor controlled telephone set |
| 10/28/1981 | EP0038430A1 Transmitter and receiver set to be carried on a protecting helmet |
| 10/27/1981 | US4297539 Telephone security attachment |
| 10/27/1981 | US4297534 Pushbutton telephone set disabling means |
| 10/27/1981 | US4297530 Electronics package |
| 10/20/1981 | US4296282 Incoming call identification arrangement |
| 10/20/1981 | US4296277 Electronic voice detector |
| 10/14/1981 | EP0037573A1 Automatic telephonic message transmitting apparatus |
| 10/14/1981 | EP0037469A1 Electronic lock, switching and hold devices for telephones |
| 10/13/1981 | US4295100 Microphone amplifier, in particular for telephone systems |
| 10/13/1981 | CA1110788A1 Telephone set with loop current interruption timing control |
| 10/13/1981 | CA1110768A1 Method and apparatus for removing room reverberation |
| 10/01/1981 | WO1981002824A1 Memory accessing system |
| 09/29/1981 | US4292481 Decorative applique and decorative faceplate assembly for push-button telephones |
| 09/29/1981 | US4292480 Method and apparatus for locating telephones |
| 09/29/1981 | US4292477 Telephone set base for both wall and desk mounting |