| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 05/28/1985 | CA1187929A1 Protective module for telephone logic circuits |
| 05/22/1985 | EP0141868A1 High resolution phototransparency image forming with photopolymers |
| 05/21/1985 | US4518830 Armored telephone cord with a longitudinal strength member |
| 05/21/1985 | US4518829 Two terminal microphone active load gain regulation circuit |
| 05/21/1985 | US4518828 Transmission circuit for an electronic telephone set |
| 05/21/1985 | US4518827 Telephone answering and message recording system |
| 05/21/1985 | US4518826 In a mounting assembly |
| 05/21/1985 | US4518821 Restaurant telephone entertainment system |
| 05/21/1985 | CA1187636A1 Automatic dialler for telephone numbers |
| 05/21/1985 | CA1187612A1 Charge coupled device |
| 05/15/1985 | EP0141289A2 Device for a telephone set |
| 05/15/1985 | EP0140880A1 Telephone autodiallers |
| 05/14/1985 | US4517656 Programmable game with virtual CPU's sharing ALU and memory for simultaneous execution of independent game inputs |
| 05/14/1985 | US4517420 Integral cup and hookswitch actuator for a telephone set |
| 05/14/1985 | US4517419 Cantilever spring telephone hookswitch adapted for printed wiring card mounting |
| 05/14/1985 | US4517414 Hookswitch bounce resistant telephone hold-mute circuit |
| 05/14/1985 | US4517410 Automatic user selected variable telephone message record and playback system |
| 05/08/1985 | EP0140040A1 Telephone call recording apparatus |
| 05/08/1985 | EP0139657A1 Non-integer programmable counter |
| 05/07/1985 | US4515998 Convertible desk to wall mounted telephone set |
| 05/07/1985 | US4515996 Telephone circuit |
| 05/07/1985 | US4515995 Telephone answering machine with apparatus for selecting particular outgoing message in response to incoming call on a particular line |
| 05/07/1985 | CA1186827A1 Liquid crystal displays for telephone sets and other telecommunications terminals |
| 05/07/1985 | CA1186825A1 Transistor bridge rectifier circuit for telephone purposes |
| 04/30/1985 | US4514596 Telephone handsets |
| 04/30/1985 | US4514594 Power line carrier telephone extension system for full duplex conferencing between telephones and having telephone call hold capability |
| 04/30/1985 | US4514593 Automatic telephone answering and recording apparatus |
| 04/24/1985 | EP0138367A2 Telephone acoustic coupler |
| 04/24/1985 | EP0138364A2 Multifrequency tone distribution using a conference arrangement |
| 04/24/1985 | EP0137943A2 Radio network for transmission of information between a pair from several pairs of radio stations |
| 04/24/1985 | EP0137806A1 Speakerphone control circuit. |
| 04/23/1985 | US4513178 Signal processing arrangement |
| 04/23/1985 | US4513177 Loudspeaking telephone system |
| 04/23/1985 | US4513176 Test apparatus for telephone equipment |
| 04/23/1985 | US4513175 Automatic calling systems for accessing communications networks |
| 04/23/1985 | CA1186086A1 Telephone device |
| 04/23/1985 | CA1186085A1 Arrangement for supporting a telephone handset or the like |
| 04/23/1985 | CA1186084A1 Electronic voice network for a telephone subscriber's substation |
| 04/23/1985 | CA1186016A1 Surge protection for signal transmission systems |
| 04/17/1985 | EP0137383A2 Telephone, especially a car telephone |
| 04/17/1985 | EP0137382A2 Handset, especially for a car telephone |
| 04/17/1985 | EP0137012A1 Method and circuitry for encoding telephone ringing signals |
| 04/16/1985 | US4511765 Universal control device for restricting dialing and time limiting telephone calls |
| 04/16/1985 | US4511764 Telephonic display device |
| 04/16/1985 | US4511761 Automatic communication standby device in cordless telephone |
| 04/16/1985 | CA1185721A1 Telephone interfaced recording and playback apparatus |
| 04/03/1985 | EP0135538A1 Electronic tone ringer |
| 04/03/1985 | EP0054024B1 Subscriber line audio processing circuit apparatus |
| 04/02/1985 | US4508939 Last number redial device |
| 04/02/1985 | US4508938 Push-button dial for a telephone |
| 04/02/1985 | US4508937 Method and circuitry for encoding telephone ringing signals |
| 04/02/1985 | US4508935 Cordless telephone having a remote control function |
| 04/02/1985 | CA1185026A1 Dialing device and method |
| 03/27/1985 | EP0135412A1 Regulated powering circuit for a telephone set |
| 03/26/1985 | CA1184641A1 System for forwarding along a telephone connection the identities of the subscribers involved in that connection |
| 03/19/1985 | US4506381 Aural transmitter device |
| 03/19/1985 | US4506116 Security dialing system for long distance telephone systems |
| 03/19/1985 | US4506115 Message alert system |
| 03/19/1985 | US4506114 Telephone circuit |
| 03/19/1985 | US4506113 Speech processing circuit |
| 03/19/1985 | US4506112 Telephone set including a circuit for seizing the line without lifting the handset off the gravity switch |
| 03/19/1985 | US4504992 Hospital bed telephone holder |
| 03/12/1985 | US4504702 Additional line coupling circuit to an intercom telephone set |
| 03/12/1985 | CA1183978A1 Solid state switch |
| 03/05/1985 | US4503398 Automatic gain control circuit |
| 03/05/1985 | US4503291 Repertory dialer with efficient data storage |
| 03/05/1985 | US4503288 Intelligent telephone |
| 03/05/1985 | US4502655 Telephone mounting bracket for mobile home |
| 02/28/1985 | WO1985000948A1 Telephone disconnect apparatus |
| 02/26/1985 | US4502138 Synchronization system for key telephone system |
| 02/26/1985 | US4502018 Gain regulation circuit for an amplifier circuit |
| 02/26/1985 | US4502016 Final bridge stage for a receiver audio amplifier |
| 02/26/1985 | US4501936 Protective cover for telephone |
| 02/26/1985 | US4501933 Transistor bridge voltage rectifier circuit |
| 02/26/1985 | US4501932 Solid state electronic dial pulse receiver circuit |
| 02/26/1985 | CA1183292A1 Telephone apparatus capable of inputting character data |
| 02/19/1985 | US4500844 Ringing signal generator employing delta-modulation power amplification techniques |
| 02/19/1985 | US4500754 Solid state off hook phone line load |
| 02/19/1985 | US4500753 Telephone answering apparatus with recorded time of day and date |
| 02/19/1985 | US4500752 Telecontrol system for an audio recorder of a radio telephone |
| 02/19/1985 | US4500158 Network interface device |
| 02/14/1985 | WO1985000716A1 Telephone trunk barring device |
| 02/14/1985 | WO1985000715A1 Cradle contact device for a telephone with a push-button set |
| 02/13/1985 | EP0132933A2 Adaptive line hybrids |
| 02/12/1985 | US4499337 Coupler for microtelephone set |
| 02/12/1985 | US4499335 Announcement recording and message playback system for a telephone answering machine |
| 02/05/1985 | US4497983 Electrical hook switch |
| 02/05/1985 | US4497980 Handsfree circuit for telephone instrument |
| 02/05/1985 | CA1182231A1 Hook flash signal actuated telephone control device |
| 01/31/1985 | WO1985000494A1 Method and apparatus for providing call tracing service |
| 01/31/1985 | WO1985000488A1 Method and apparatus for displaying at a selected station special service information during a silent interval between ringing |
| 01/31/1985 | WO1985000487A1 Method and apparatus for sending a data message to a selected station during a silent interval between ringing |
| 01/29/1985 | US4496799 Handsfree telephone instrument using digital dial |
| 01/29/1985 | US4496798 Ringing circuit for telephone subset, designed as an integrated circuit |
| 01/29/1985 | US4496797 Circuit for automatically connecting and disconnecting a speakerphone to a telephone line |
| 01/23/1985 | EP0132173A1 Circuit arrangement for timed loop interruption in a telephone |
| 01/23/1985 | EP0131919A2 Voice privacy system |
| 01/22/1985 | US4495652 Control arrangement for radio apparatus |
| 01/22/1985 | US4495386 Telephone extension system utilizing power line carrier signals |
| 01/22/1985 | US4495383 Hands-free telephone-speaker interfacer |