| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 02/18/1992 | US5090052 Telephone system with multiple extension telephones |
| 02/18/1992 | CA1296116C Automatic positive telephone disconnect system |
| 02/15/1992 | WO1992003884A1 A computer keyboard |
| 02/15/1992 | CA2089000A1 Computer keyboard |
| 02/13/1992 | DE4024891A1 Repeater circuitry for telecommunications e.g. telephone exchange - uses control and switching device with two MOSFET switch elements |
| 02/12/1992 | EP0470548A1 Method for controlling attenuation in a digital hands-free telephone set |
| 02/12/1992 | EP0470403A2 Keyboard and legend lighting |
| 02/12/1992 | CN2096174U Button cipher telephone |
| 02/12/1992 | CN2096173U Automatic talking audio amplifier telephone |
| 02/12/1992 | CN1058684A Communication apparatus |
| 02/11/1992 | US5087208 Movable telephone adapter |
| 02/11/1992 | US5087004 Convertible mounting apparatus |
| 02/11/1992 | CA1295630C Light emitting push button switch for an electronic apparatus |
| 02/07/1992 | WO1992003007A1 Portable office cordless telephone |
| 02/06/1992 | WO1992002097A1 Self-contained electronic recorder for telephone calls |
| 02/06/1992 | WO1992002012A1 Composite acoustic system for telephone hand-sets |
| 02/06/1992 | WO1992001983A1 Process for carrying out a variable dialogue with technical equipment |
| 02/06/1992 | DE4024708A1 Telephone subscriber's appts. connector without exchange line - uses interface coupled to transmission-reception stage of radio telephone for linkage |
| 02/06/1992 | DE4024254A1 Winding procedure for cords and cables - using torsion spring to provide power for rewinding on reel |
| 02/05/1992 | EP0469955A2 Transmitter-receiver handset |
| 02/05/1992 | EP0469546A2 Portable telephone set comprising input keys and a shift key on different surfaces |
| 02/05/1992 | EP0469476A2 Information transmission system with speech, image and text data communication between subscriber units |
| 02/05/1992 | EP0469114A1 A method for active feedback suppression |
| 02/05/1992 | EP0469077A1 Analog/digital voice storage cellular telephone |
| 02/05/1992 | CN1015415B Modular microphone assembly |
| 02/04/1992 | US5086510 Multi-choice information system for a motor vehicle |
| 02/04/1992 | US5086509 Thermally adaptive housing for hand held radio telephone device |
| 02/04/1992 | US5086466 Telephone base structures for stabilizing upon support surfaces |
| 02/04/1992 | US5086464 Telephone headset for the hearing impaired |
| 02/04/1992 | US5086463 Vandal-resistant communications station |
| 02/04/1992 | US5086459 Timing circuit and a secure telephone jack utilizing this circuit |
| 02/04/1992 | US5086458 Telephone answering system and apparatus for direct caller selection of a party line extension |
| 02/04/1992 | US5086456 Dial unit detachably mounted on public telephone for equal access |
| 02/04/1992 | US5086455 Facsimile arrangement having automatic answering telephone set and facsimile set and switching process therefor |
| 02/04/1992 | US5086452 Radio telephone system and its control method |
| 02/04/1992 | US5086451 Method for controlling a plurality of stationary apparatuses in a cordless telephone system |
| 02/04/1992 | CA1295435C Announcement storage system for telephone answering machines |
| 02/04/1992 | CA1295408C Headset having a post auricle mount and arranged to be worn on a person's outer ear |
| 01/31/1992 | CA2047423A1 Handset |
| 01/30/1992 | DE4023993A1 Auxiliary protection unit for telephone subscriber's appts. - automatic switches over to speech ROM requesting identification of caller after set number of rings |
| 01/29/1992 | EP0468790A2 Portable transceiver and electronic serial number transfer system therefor |
| 01/29/1992 | EP0468569A2 A method of operating a communications system, a communications system and a secondary station for use in the system |
| 01/29/1992 | EP0468025A1 Radio having removable memory means for storing radio user validation code |
| 01/29/1992 | CN2094836U Telephone automatic recording, lefting message interface |
| 01/28/1992 | CA1295064C Voice recognition system used in telephone apparatus |
| 01/27/1992 | WO1992002099A1 Cellular telephone controller with synthesized voice feedback |
| 01/23/1992 | DE4036405C1 Telecommunications circuitry for PBX or party line connection - separates telephone subscriber's appts. into two groups and disconnects one group from exchange line when call is made |
| 01/22/1992 | EP0467022A2 Arrangement for expanding private branch exchanger |
| 01/22/1992 | EP0466855A1 Speakerphone for cellular telephones with howl prevention |
| 01/22/1992 | EP0377581A4 Analog/digital data storage system |
| 01/22/1992 | CN2094161U 载波电话机 Telephone carrier |
| 01/22/1992 | CN2094160U Improved test clamp for telephone transmission quality |
| 01/22/1992 | CN2094159U Induction keyboard telephone set |
| 01/22/1992 | CN2094158U One-line multi-set automatic switching device for telephones |
| 01/21/1992 | US5082448 Rotatable electrical connector |
| 01/18/1992 | WO1992002096A1 Abbreviated and enhanced dialing apparatus and methods |
| 01/18/1992 | CA2065858A1 Abbreviated and enhanced dialing apparatus and methods |
| 01/17/1992 | WO1992002103A1 Method for authentication and protection of subscribers in telecommunication systems |
| 01/15/1992 | EP0465856A1 Door installation, especially door interphone |
| 01/15/1992 | CN2093479U Telephone recording controller |
| 01/15/1992 | CN2093478U Magnetic induction type telephone recording and amplification wireless interconnecting device |
| 01/15/1992 | CN2093477U Handy telephone receiver |
| 01/14/1992 | US5081674 Double annular ring speaker gasket |
| 01/14/1992 | US5081673 Voice bridge for relay center |
| 01/14/1992 | US5081672 Automatic telephone answering apparatus |
| 01/14/1992 | US5081668 Radio telephone system having recording and reproduction functions |
| 01/09/1992 | WO1992000641A1 Adding cordless handset capability to a corded telephone |
| 01/09/1992 | WO1992000640A1 A hands-free module |
| 01/09/1992 | DE4113366A1 Telephone exchange return call signalling system - has calling subscriber number data stored with information indicating return call requirement |
| 01/09/1992 | DE4020618A1 Signalling system for telephone return call connection - uses memory to hold call number data of calling subscriber |
| 01/09/1992 | CA2064695A1 Hands-free module |
| 01/08/1992 | EP0465178A2 Device for detecting a plurality of frequencies sent from an exchange |
| 01/08/1992 | EP0465089A2 Automated channel test unit |
| 01/08/1992 | EP0464767A1 Device composed of two elements jointed on a hinge and electrically connected |
| 01/08/1992 | EP0464610A2 Method for generating an information for the called subscriber in a communication system, especially a private telecommunication system |
| 01/08/1992 | CN2092835U Transmiting code of acoustic frequency |
| 01/07/1992 | CA1294082C Adaptive expander for telephones |
| 01/07/1992 | CA1294081C Loudspeaking telephone with a variable gain circuit |
| 01/07/1992 | CA1294080C Multiple language telephone answering machine |
| 01/07/1992 | CA1294079C Voice controlled dialer having memories for full-digit dialing for any users and abbreviated dialing for authorized users |
| 01/07/1992 | CA1294077C Display terminal for a videophone |
| 01/02/1992 | EP0464011A1 A hands-free module for a mobile telephone |
| 01/02/1992 | EP0463856A2 A device for scanning the menus of a telephone set |
| 01/02/1992 | EP0463582A2 Apparatus for capturing and storing telephone numbers |
| 01/02/1992 | DE4105290A1 Communications peripheral selection information memory - with transfer of selection information indicated on optical display for use as call repetition information |
| 01/02/1992 | DE4020617A1 Wall mounting for telephone handset - comprises baseplate and angle bracket matched to specific handset |
| 01/01/1992 | CN2092170U Digital responder of automatic recording telephone |
| 01/01/1992 | CN2092169U Dual-line, non-polarity and single-chip integrated loudspeaking telephone |
| 01/01/1992 | CN2092168U Both automatic and direct-connection magnetotelephone |
| 12/31/1991 | US5077832 Radio transceiver with optional display |
| 12/31/1991 | US5077789 Remotely commanded telephone switch enhancing system |
| 12/31/1991 | US5077786 System and method for controlling facsimile apparatus in response to a computer generated signal or a cng signal |
| 12/31/1991 | US5077785 System for recording comments by patrons of establishments |
| 12/31/1991 | CA1293830C2 Telephone system with stimulus operation or default operation |
| 12/27/1991 | EP0462890A2 Communications systems |
| 12/27/1991 | EP0462846A2 Retractable reel, assembly for telephone extension cord |
| 12/27/1991 | EP0462488A2 Apparatus for capturing and storing call activity at a telephone set |
| 12/26/1991 | WO1991020161A1 An ear protector |
| 12/26/1991 | WO1991020146A1 Subscriber connection device for a broad-band communications network |
| 12/26/1991 | WO1991020139A1 Enhanced infrared-connected telephone system |