| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
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| 03/16/1988 | EP0259683A2 Terminal station of a radio communication network capable of effectively using radio channels assigned to the network |
| 03/16/1988 | CN86209022U Analog phonetic cryptographic coder |
| 03/16/1988 | CN86207452U Telephone set with duplex wire-wireless switching at same frequency |
| 03/15/1988 | US4731836 Telephone set for table-top and wall operation |
| 03/15/1988 | US4731833 Low profile circuit board mounted telephone jack |
| 03/15/1988 | US4731831 Telephone instrument |
| 03/15/1988 | US4731830 Nonsaturating interface supply |
| 03/15/1988 | US4731826 Mixed mode dialing system |
| 03/15/1988 | US4731815 Reset system for telephone answering machine in the event of a power failure |
| 03/15/1988 | US4731814 Computer-controlled cordless telephone |
| 03/15/1988 | US4731813 Address encoding system for portable battery-operated devices |
| 03/15/1988 | US4731812 Installation with portable, wireless telephone sets |
| 03/15/1988 | US4731811 Radiotelephone system, particularly for motor vehicles |
| 03/15/1988 | CA1234235A1 Full duplex speakerphone for radio and landline telephones |
| 03/10/1988 | WO1988001819A1 Method for recognizing telephone tones, device for implementing such method, telephone deviators and responders provided with such a device |
| 03/10/1988 | DE3630529A1 Subscriber line for terminals in an integrated-service digital communications network |
| 03/09/1988 | EP0258739A2 Cordless telephone set operated under multi-channel access |
| 03/09/1988 | EP0258717A1 Mounting device for a display |
| 03/09/1988 | EP0258274A1 Portable radio transceiver housing structurally supported by an integral battery |
| 03/09/1988 | EP0258267A1 A telephone guard |
| 03/09/1988 | CN87205897U Parameter testing device for a microprocessor telephone dial |
| 03/09/1988 | CN86105347A Circuit of unmanned automatic and recordable telephone |
| 03/08/1988 | CA1233925A1 Digital loudspeaking telephone |
| 03/03/1988 | DE3629475A1 Telephone terminal with notebook function |
| 03/03/1988 | DE3628922A1 Circuit arrangement for connecting two or more telephone sets to one subscriber line |
| 03/02/1988 | EP0257687A2 Digital transmission system |
| 03/01/1988 | US4728300 Surface covering allowing an electric receiver to be supplied with power at varying positions on the surface |
| 03/01/1988 | CA1233584A1 High impedance transient resistant transistorized hold circuit |
| 03/01/1988 | CA1233579A1 Cordless telephone |
| 03/01/1988 | CA1233578A1 Data entry and display control circuit |
| 02/23/1988 | US4727573 Switch with plural rotors |
| 02/23/1988 | US4727571 Circuit for surge voltage protection in electronic telephone stations |
| 02/23/1988 | US4727570 Waveform generators |
| 02/23/1988 | US4727569 Hardwire airplane telephone apparatus |
| 02/23/1988 | US4727535 Telephone network coupler |
| 02/18/1988 | DE3627025A1 Dialling restriction for a telephone device |
| 02/17/1988 | CN87105143A Communication apparatus for building entrance |
| 02/16/1988 | US4726063 Telephone lock |
| 02/16/1988 | US4726059 Variable color display telephone |
| 02/16/1988 | US4726053 Reset system for telephone answering machine in event of power failure |
| 02/16/1988 | US4726052 Radio telephone system and method for controlling same |
| 02/16/1988 | US4726051 Cordless telephone |
| 02/16/1988 | US4726048 Telephone privacy circuit |
| 02/11/1988 | WO1988001122A1 Wireless handset for a telephone set |
| 02/11/1988 | DE3726366A1 Communication network and communication transmission process |
| 02/11/1988 | DE3644066A1 Subscriber equipment for wireless digital telephony |
| 02/10/1988 | EP0255670A2 Mobile communications system capable of avoiding interference with control channel |
| 02/10/1988 | EP0255523A1 Method and apparatus for synthesizing speech from speech recognition templates. |
| 02/10/1988 | CN86101535A Multifrequency sequence-combination coding method |
| 02/09/1988 | US4724540 Speakerphone with fast idle mode |
| 02/09/1988 | US4724537 Method and apparatus for managing the use of an electronic lock for a mobile radio telephone |
| 02/09/1988 | US4724521 Method for operating a local terminal to execute a downloaded application program |
| 02/09/1988 | US4724119 Telephone answering machine with an erasable message recorded on the incoming message tape by the manufacturer |
| 02/09/1988 | CA1232694A1 Automatic telephone answering apparatus |
| 02/04/1988 | DE3713104A1 Circuit arrangement for reducing anonymous calls in telephone traffic |
| 02/04/1988 | DE3625646A1 User terminal for video telephony |
| 02/03/1988 | EP0255048A2 Portable radio telephone having power saver |
| 02/03/1988 | CN87204888U Telephone set with amplifier |
| 02/02/1988 | US4723281 Automobile telephone |
| 02/02/1988 | US4723279 Line use indicator in a telephone set |
| 02/02/1988 | US4723278 Voice circuit of telephone |
| 02/02/1988 | US4723277 Loudspeaking telephone set having an anti-Larsen device for instability detection and control |
| 02/02/1988 | US4723276 Two-module telephone terminal |
| 02/02/1988 | US4723275 Circuit arrangement for generating an acoustic ringing signal in a subscriber telephone set |
| 02/02/1988 | US4723267 Telephone line interface and dialer circuitry for telecommunications equipment |
| 02/02/1988 | US4723265 Abreviated dialer with reduced key operations |
| 02/02/1988 | CA1232385A1 Cordless telephone |
| 02/02/1988 | CA1232384A1 Cordless telephone |
| 01/28/1988 | DE3723363A1 Netzzugriffsvorrichtung Network access device |
| 01/27/1988 | EP0254405A2 Telephone instrument |
| 01/27/1988 | CN87200369U Hygienical public telephone without touch |
| 01/27/1988 | CN87104660A Telephone set comprising an improved dial pulsing circuit |
| 01/27/1988 | CN87103915A Casing, particularly junction-box casing for telecommunications engineering |
| 01/26/1988 | US4721437 Animated annunciator apparatus |
| 01/26/1988 | CA1232094A1 Vandal-resistant shield for telephone keypad |
| 01/21/1988 | DE3622712A1 Method for blocking a telephone device for outgoing calls in telephone systems with pulse- and/or frequency dialling and dialling block the for carrying out the method |
| 01/21/1988 | DE3622711A1 Dialling block for a telephone device in telephone systems with pulse or frequency dialling |
| 01/20/1988 | EP0253756A2 Casing, particularly distribution casing for telecommunication engineering |
| 01/20/1988 | EP0252969A1 Telephone intercom device |
| 01/19/1988 | US4720858 Telephone handset/acoustic coupler adapter |
| 01/19/1988 | US4720857 Miniaturized headset for two-way voice communication |
| 01/19/1988 | US4720855 Telephone apparatus |
| 01/19/1988 | US4720853 Ring signal discriminator |
| 01/19/1988 | US4720849 Information display apparatus |
| 01/19/1988 | US4720848 Communication system with voice announcement means |
| 01/19/1988 | US4720847 Answering device |
| 01/19/1988 | US4720846 Automatic telephone answering and recording apparatus |
| 01/19/1988 | CA1231788A1 Duplex speech transmission method and a system therefor |
| 01/14/1988 | WO1988000418A1 Telephone on-hold device |
| 01/14/1988 | WO1988000371A1 Peripheral controller |
| 01/14/1988 | DE3623017A1 Circuit arrangement for the cradle switch of a telephone terminal |
| 01/14/1988 | DE3621412A1 Call barring device for a telephone terminal connected to the telephone network and operating according to a multi-frequency dialling procedure |
| 01/13/1988 | EP0252680A2 Automatic dialing apparatus for establishing connections between authorised subscribers |
| 01/13/1988 | EP0252556A1 Telephone set comprising a dial pulsing circuit having a switching transistor with a base current related to the telephone line current |
| 01/13/1988 | CN87200254U Simple rotating spacer for telephone |
| 01/13/1988 | CN86101521A Telephone attachment |
| 01/13/1988 | CN85103507B Active noise reducing microphone |
| 01/12/1988 | US4718742 Battery fitting device usable for electronic appliance |
| 01/12/1988 | CA1231479A1 Communication system having dynamically assigned station set buttons |
| 01/12/1988 | CA1231477A1 Communication system with operation-procedure guiding function by speech |