| Patents for H04M 11 - Telephonic communication systems specially adapted for combination with other electrical systems (53,055) |
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| 01/24/1991 | DE3922804A1 Transmission of telephone cable parameters over lines - converts cable measured value into analog frequency within range below speech frequency |
| 01/23/1991 | EP0409622A2 Communication terminal equipment |
| 01/23/1991 | CN1048776A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048775A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048774A Ensemble modem structure for imperfect transmission media |
| 01/22/1991 | US4987589 Entrance telephone system utilizing the public subscriber telephone network |
| 01/22/1991 | US4987588 Data transmission processing machine |
| 01/22/1991 | US4987587 Method and apparatus for providing 800 number service |
| 01/22/1991 | US4987586 Modem-telephone interconnect |
| 01/22/1991 | US4987573 Telephone system digital channel bank interface |
| 01/22/1991 | CA1279415C Telephone line carrier system |
| 01/16/1991 | EP0408236A2 Video transmission and control system utilizing internal telephone lines |
| 01/16/1991 | EP0408086A2 Watch pager system |
| 01/16/1991 | EP0408024A2 Universal ISDN subscriber line connection group |
| 01/16/1991 | EP0407673A1 Process of synchronizing a receiving modem after a training on data |
| 01/16/1991 | EP0282567A4 Low voltage and low power detector circuits |
| 01/16/1991 | EP0276296A4 Current-limiting circuit |
| 01/16/1991 | CN1048640A Comprehensive communication system for electric power dispatching |
| 01/15/1991 | US4985911 Conversational video phone |
| 01/15/1991 | US4985892 Baseband local area network using ordinary telephone wiring |
| 01/15/1991 | CA1279134C Communications network and method with visible and voice message transmission capabilities |
| 01/09/1991 | EP0406799A1 Multi-function videotex terminal |
| 01/09/1991 | EP0406780A2 Office communication system for transmitting data and/or image information via a switched network |
| 01/09/1991 | EP0357719A4 Marketing research system for obtaining retail data |
| 01/08/1991 | US4984250 DC termination circuit for subscriber cables |
| 01/08/1991 | US4984155 Computer system |
| 01/03/1991 | DE3920721A1 Telephone terminal operation with data indication - involves initialising by transmission of specific dial signal to exchange |
| 01/02/1991 | EP0406191A1 Method of througconnecting wideband connections in a digital time switch module between subscribers and a device for carrying out the method |
| 01/02/1991 | EP0405899A2 Communication apparatus |
| 01/02/1991 | EP0405394A2 Subscriber equipment for transmitting temporarily stored data to a paging receiver fitted with an acoustical and/or optical output device |
| 01/02/1991 | CN1048293A Video text communication card |
| 01/02/1991 | CN1048271A Method and apparatus for remotely controlling and monitoring use of computer software |
| 01/02/1991 | CA1278604C Line switching control system for mobile communication |
| 01/01/1991 | US4981371 Integrated I/O interface for communication terminal |
| 12/27/1990 | WO1991000678A1 Method of throughconnecting wideband connections in a digital time switch module between subscribers, and a device for carrying out the method |
| 12/27/1990 | WO1991000665A1 Video telephone employing pulse width modulation for data transmission |
| 12/27/1990 | WO1991000660A1 Synchronization and equalization in a tdma cellular system |
| 12/27/1990 | EP0404555A2 Communication system |
| 12/27/1990 | EP0404554A2 Charging system |
| 12/27/1990 | CA2063258A1 Video telephone employing pulse width modulation for data transmission |
| 12/26/1990 | CN2068299U Electronic brain alarm telephone |
| 12/25/1990 | US4980911 Transient signal elimination circuit for telecommunications applications with CPU control means |
| 12/18/1990 | CA1278121C Data communication system |
| 12/15/1990 | WO1990016126A1 Controller prohibiting data communication until user is verified |
| 12/13/1990 | WO1990015394A1 Appliance interface for exchanging data |
| 12/12/1990 | EP0402083A2 Teleconferencing method for a secure key management system |
| 12/12/1990 | EP0401804A2 Facsimile device |
| 12/11/1990 | US4977593 Optical communications network |
| 12/11/1990 | US4977555 Asynchronous duplex data communication for requesting services |
| 12/11/1990 | CA1277789C Method of controlling the electric power supplied to a modem |
| 12/11/1990 | CA1277743C Broadband digital transmission systems |
| 12/08/1990 | WO1990015497A1 Method and devices for transmitting to subscribers from a central server connected to a high throughput digital telecommunication network information recorded on digital disks |
| 12/08/1990 | CA2058439A1 Method and devices for transmitting to subscribers from a central server connected to a high throughput digital telecommunication network information recorded on digital disks |
| 12/06/1990 | DE3918298A1 Remote operation of video recorder over telephone lines - is performed by speech or encoded digital or analogue transmission over network to special tele-control interface |
| 12/05/1990 | EP0400771A2 Special service call routing |
| 12/05/1990 | EP0227800B1 Telephone line interface circuitry for telecommunications equipment |
| 12/05/1990 | CN2067050U 语言报警电话 Language alarm call |
| 12/05/1990 | CN2067049U Emergency call-for-help device |
| 12/04/1990 | US4975900 Response delay system of an ISDN terminal in a point to multipoint configuration |
| 12/04/1990 | US4975896 Communications network and method |
| 11/29/1990 | DE3917075A1 Electronic equipment for acoustic room monitoring - uses programmable circuitry powered by two wire supply in conjunction with telephone system |
| 11/28/1990 | EP0399520A2 A radio communication system |
| 11/28/1990 | EP0399018A1 Watching method based on telephone system |
| 11/28/1990 | CN1010648B Intelligent control system for telephone |
| 11/27/1990 | US4974255 System for remotely monitoring a single- or multi-function installation by telephone |
| 11/27/1990 | US4974254 Interactive data retrieval system for producing facsimile reports |
| 11/27/1990 | US4974252 Interactive commercial/entertainment network |
| 11/27/1990 | CA1277016C Communications system having voice and digital data capability and employing a plurality of voice and data buses in main service unit and serial packetized transmission to and from telephones |
| 11/27/1990 | CA1276983C Modem with call waiting |
| 11/22/1990 | EP0398729A2 Processor modem |
| 11/22/1990 | EP0398626A2 Telephone call forwarding device |
| 11/22/1990 | EP0397908A1 Specification consistent videotext apparatus programming method |
| 11/20/1990 | US4972504 Marketing research system and method for obtaining retail data on a real time basis |
| 11/20/1990 | US4972463 In-store multiple device communications unit and centralized data system utilizing same |
| 11/20/1990 | US4972462 Multimedia mail system |
| 11/20/1990 | US4972176 Laminated polymeric panels with electroconductive rods sandwiched between to form a window |
| 11/16/1990 | CA2012804A1 Telephone call forwarding device |
| 11/14/1990 | EP0397164A1 Alphanumeric text entry device with display and keyboard, and application of said device to a telephone terminal |
| 11/13/1990 | US4970716 Protocol integrating videotex communication system |
| 11/13/1990 | CA1276327C Circuit switching system |
| 11/13/1990 | CA1276250C Method and apparatus for generating intelligence on a carrier wave |
| 11/07/1990 | EP0396414A2 Information display system |
| 11/07/1990 | EP0396253A1 Data transmission system for reading and converting bar coded information into standard telephone signals |
| 11/07/1990 | EP0396062A2 Television system for the interactive distribution of selectable video presentations |
| 11/07/1990 | EP0395771A1 Distress calling device |
| 11/07/1990 | CN1046823A Digital radio communication system and two-way radio |
| 11/06/1990 | US4969184 Data transmission arrangement |
| 11/06/1990 | US4969183 Telephone lotto number system and service |
| 11/06/1990 | US4969136 Communications network and method with appointment information communication capabilities |
| 11/01/1990 | WO1990013196A1 Device for telecommunication systems |
| 10/31/1990 | EP0395507A1 Transmission and reception system for the transmission of moving colour pictures and sound through independent channels |
| 10/31/1990 | EP0394895A1 Communication adapter for remote control terminal |
| 10/31/1990 | EP0394477A1 Method of matching modem mode by pbx inward dialling |
| 10/31/1990 | EP0119218B1 Bulk/interactive data switching system |
| 10/31/1990 | DE4013420A1 Netzsteuereinrichtung Network controller |
| 10/30/1990 | US4967195 Hospital signaling and communications system |
| 10/29/1990 | WO1990013865A1 Method and apparatus for remotely controlling and monitoring the use of computer software |
| 10/28/1990 | WO1990013212A1 Digital radio communication system and two way-radio |
| 10/27/1990 | WO1990013197A1 Remote confinement system |
| 10/27/1990 | CA2051666A1 Remote confinement system |