Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 11 - Telephonic communication systems specially adapted for combination with other electrical systems
Patents for H04M 11 - Telephonic communication systems specially adapted for combination with other electrical systems (53,055)
03/1989
03/29/1989EP0308571A2 Data accumulator and transponder
03/28/1989US4817147 Intelligent synchronous modem and communication system incorporating the same
03/28/1989US4817137 Apparatus for remotely determining hook status conditions
03/28/1989US4817131 Automatic meter reading system
03/28/1989US4817129 Method of and means for accessing computerized data bases utilizing a touch-tone telephone instrument
03/28/1989US4817127 Modular dictation/transcription system
03/28/1989US4817089 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/28/1989US4816904 Television and market research data collection system and method
03/28/1989CA1251877A1 Tone-responsive circuit for activating an instrumentality interfacing system
03/22/1989EP0308046A2 Voice interactive security system
03/22/1989EP0307485A1 Radio-signal responsive apparatus for controlling mobile equipment
03/21/1989US4815137 Voiceband signal classification
03/21/1989US4815136 Voiceband signal classification
03/21/1989US4815128 Gateway system and method for interconnecting telephone calls with a digital voice protected radio network
03/21/1989US4815031 Method for granting a request to authorized data terminal users accessing from any locations
03/21/1989US4814972 Information retrieval system
03/21/1989CA1251586A1 Ensemble modem structure for imperfect transmission media
03/21/1989CA1251585A1 Interphone system with security function
03/15/1989EP0307181A2 Data processing apparatus
03/14/1989US4813067 Apparatus for connecting selectively a telephone answering device or additional equipment, such as a facsimile machine, to telephone lines
03/14/1989US4813040 Method and apparatus for transmitting digital data and real-time digitalized voice information over a communications channel
03/14/1989US4812992 Remotely rechargeable
03/14/1989US4812965 Remote postage meter insepction system
03/14/1989CA1251263A1 Synchronous/asynchronous modem
03/09/1989DE3728479A1 Monitoring, control and communications system
03/08/1989EP0306426A1 Adapting methods and devices for introducing data to electronic taximeters from a central computer temporarily connected to a local terminal
03/08/1989EP0305630A2 Data accumulator and transponder
03/08/1989CN2033964U Panalarm device for intelligence computer telephone
03/07/1989US4811389 Parallel off hook detector for electronic remote data recorder
03/07/1989US4811388 Telecommunication network including a central back-up memory
03/07/1989US4811386 Called party response detecting apparatus
03/07/1989US4811385 Data communication apparatus which can selectively store data or not, according to communication line status
03/07/1989US4811376 Paging system using LPC speech encoding with an adaptive bit rate
03/07/1989US4811339 Non-coded information and companion data switching mechanism
03/07/1989US4811234 Postage meter recharging system
03/07/1989CA1250979A1 Wideband digital signal distribution system
03/07/1989CA1250946A1 Method and apparatus for transforming codes
03/02/1989DE3804552C1 Door intercom system
03/01/1989EP0304569A2 Supervisory, control and communication system
03/01/1989CN1031458A Presentation player
03/01/1989CN1031457A Digital, interactive comunication system
02/1989
02/28/1989US4809320 Door security system
02/28/1989US4809317 Telephone line exclusion device
02/28/1989US4809316 Method for identifying operation modes of an antitheft system
02/28/1989US4809271 Voice and data multiplexer system
02/28/1989US4808905 Current-limiting circuit
02/28/1989CA1250673A1 Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of rf channels
02/23/1989DE3727165A1 Priority circuit arrangement for connecting a plurality of videotext and/or remote data-processing devices to a modem
02/22/1989CN1031306A Home unit for wireless digital telephone system
02/21/1989US4807278 Telecommunication controller having a telephone line sharing function
02/21/1989US4807276 Re-transmission method and apparatus in communication system using public communication lines
02/21/1989US4807225 Telephone line carrier system
02/14/1989US4805208 Modem compression system for telephone network
02/14/1989US4805207 Message taking and retrieval system
02/14/1989US4805206 Function controller serving as an automatic telephone answering machine in an audio/video component system
02/14/1989US4805205 Method and device for establishing bidirectional communications between persons located at different geographically distant stations
02/14/1989US4805134 Electronic system for accessing graphical and textual information
02/14/1989US4805119 User terminal for videotex
02/14/1989CA1250065A1 System for controlling network activation sequence
02/08/1989CN2032382U Automatic phone alarm system
02/07/1989US4803702 Reset and synchronization interface circuit
02/06/1989EP0203913A4 Control apparatus.
01/1989
01/31/1989US4802209 Paging system for electronic telephone apparatus
01/24/1989US4800439 Data communication apparatus adapted to perform data communication and speech communication
01/24/1989US4800376 Multiple display system
01/18/1989EP0299784A2 Feature telephone integration device
01/17/1989US4799254 Portable communication terminal for remote database query
01/17/1989US4799213 Data transmission system
01/17/1989US4799144 Multi-function communication board for expanding the versatility of a computer
01/11/1989CN1030309A Information interchange between terminal and processing center
01/10/1989US4797914 Telephone display
01/10/1989US4797578 Arrangement for adjusting an impedance network in an integrated semiconductor circuit
01/02/1989EP0229170A4 Statistical analysis system and method for use with public communication facility.
12/1988
12/28/1988EP0296758A1 Emergency call system
12/28/1988EP0296153A1 User data display station.
12/28/1988CA1247764A Key telephone system
12/27/1988US4794641 Data transmission system of key telephone system
12/27/1988US4794639 Method and apparatus for automatically transmitting a message to a telephone terminal
12/27/1988US4794637 Apparatus for connecting telephone answering device and telephone terminal equipment, selectively, to telephone lines
12/27/1988US4794634 Position-sensitive photodetector and light transmissive tablet and light-emitting pen
12/27/1988US4794595 Voice and data transmission system
12/22/1988DE3718742A1 Electric circuit arrangement for coupling telecommunications functional units to the telephone network
12/21/1988EP0295864A2 Consumption meter
12/20/1988US4792968 Statistical analysis system for use with public communication facility
12/20/1988US4792921 Data processing node
12/20/1988US4792849 Digital interactive communication system
12/14/1988EP0295146A2 Supervised, interactive alarm reporting system
12/14/1988EP0295029A2 Integrated data voice multiplexer
12/14/1988CN88103100A High speed half duplex modem with fast turnaround protocol
12/13/1988US4791660 Variable data compression announcement circuit
12/13/1988US4791658 Integrated alarm and touch tone telephone system
12/06/1988CA1246261A1 Alarm system
12/06/1988CA1246258A1 Modem with power-off ring detection
12/06/1988CA1246211A1 Connecting apparatus for an information processing system
11/1988
11/30/1988EP0292691A2 Fast turnaround protocol for use with a high speed half duplex modem
11/30/1988EP0292476A1 Low speed gate circuit
11/29/1988US4788717 Telephone line interface option module
11/29/1988US4788714 Remote controlling telephone unit for selectively activating one of a plurality of devices
11/29/1988US4788711 Apparatus and method for a cellular freeway emergency telephone service
11/29/1988US4788709 Facsimile communication terminal with memo pattern memory
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