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)
06/1990
06/19/1990US4935951 Emergency telephone actuated signal light or the like device and method
06/19/1990US4935870 Information retrieval video text system
06/14/1990WO1990006650A1 Watching method based on telephone system
06/14/1990WO1990006548A1 Telephone-programmable computer
06/13/1990EP0372894A2 Image communication apparatus
06/13/1990EP0372877A2 Data communication apparatus
06/13/1990CN1043055A Digital key telephone system
06/12/1990CA1270345A1 Apparatus for transmitting information via telephone lines
06/12/1990CA1270305A1 Automatic synchronous/asynchronous modem
06/06/1990EP0371726A2 Facsimile telegraph
06/05/1990US4932047 Conversational video phone
06/05/1990US4931250 Multimode modem
05/1990
05/29/1990US4930151 Telephone call forwarding device
05/29/1990US4930150 Telephonic interface control system
05/29/1990CA1269773A2 Communication system
05/22/1990US4928305 Intelligent modem with manual escape switch
05/17/1990DE3936309A1 Datenkommunikation-endgeraet Data communication terminal
05/16/1990CN1042281A Automatic balancing circuit for longitudinal transmission system
05/16/1990CN1042280A Transient signal elimination circuit for telecommunications applications
05/15/1990US4926465 Method for indicating a communicating duration of an office line in a keyphone system
05/15/1990US4926464 Telephone communication apparatus and method having automatic selection of receiving mode
05/15/1990US4926463 Data communication apparatus having a reprogrammable voice memory
05/10/1990DE3837610A1 Method and circuit arrangement for alerting videotex subscribers to new videotex messages which they have received but not yet read
05/09/1990EP0367270A2 Data circuit-terminating equipment with power source device attached thereto
05/09/1990CN1042035A Feature negotiation protocol and dynamically adjustable retraming sequence for high speed half duplex method
05/08/1990US4924493 Method for monitoring call setup communications
05/08/1990US4924492 Method and apparatus for wideband transmission of digital signals between, for example, a telephone central office and customer premises
05/08/1990CA1268861A1 Postage meter recharging system
05/02/1990EP0366250A1 Power-down modem
05/02/1990EP0365649A1 Apparatus and method for mapping the connectivity of communications systems with multiple communications paths
05/01/1990US4922534 Intelligent synchronous modem and communication system incorporating the same
05/01/1990US4922524 Facsimile system with a voice transmission function
05/01/1990US4922523 Videotex with telephone call screening system
05/01/1990US4922522 Telecommunications access to lottery systems
05/01/1990US4922518 Selective dissemination of information
05/01/1990US4922516 Telephone technician's terminals with auto-selection of dial pulse on DTMF signalling
05/01/1990US4922514 Method and apparatus for dispatching services
05/01/1990CA1268568A1 Communications network and method with appointment information communication capabilities
05/01/1990CA1268545A1 Postage meter message printing system
05/01/1990CA1268544A1 Postage meter communication system
05/01/1990CA1268543A1 Postage meter recharging system
04/1990
04/25/1990EP0364866A2 Feature negotiation protocol and dynamically adjustable retraining sequence for a high speed half duplex modem
04/25/1990EP0364444A1 Internal communication system.
04/25/1990CN2056552U Telephone remote controller for electric equipments
04/24/1990US4920561 Ring detector for telephone line
04/24/1990US4920556 Telephone with built-in emergency panic switch, long distance toll timer and music on hold cards
04/24/1990CA1268275A1 Programmable telephone/dictation terminal and method of operating same
04/24/1990CA1268274A1 Portable communication terminal for remote database query
04/24/1990CA1268253A1 Portable handheld terminal including optical bar code reader and electromagnetic transceiver
04/24/1990CA1268228A1 Voice interactive security system
04/19/1990WO1990004300A1 A remote supervision system
04/19/1990WO1990004299A1 A multi-purpose communications device
04/18/1990EP0363956A2 Information processing apparatus separably combined with telephone unit
04/18/1990EP0363847A1 System for substituting stored video information for another video information
04/18/1990EP0363680A2 Method for data transmission
04/18/1990CN1041499A Third-class facsimile repeater
04/17/1990US4918721 Push button phone capable of sending to the telephone line alphabetical characters
04/17/1990US4918717 Alarm system having bidirectional communication with secured area
04/17/1990US4918688 Method and apparatus for coupling computer work stations
04/17/1990US4918615 Building management system
04/17/1990CA1267960A1 Multiple access communication system having loop- check circuitry for switching intraoffice connections
04/12/1990DE3930893A1 Transmitting data between telephone subscribers - using data modem microprocessor for calling voltage detection when loop current flows
04/10/1990US4916732 Communication system having telephonic function
04/10/1990US4916729 Mobile station for an automobile telephone system
04/10/1990US4916607 Computer for executing a process control program and a communication control program in parallel
04/05/1990WO1990003702A1 Method of matching modem mode by pbx inward dialling
04/05/1990WO1990003701A1 Method of matching operation mode of a modem
04/04/1990CN1041051A Method for transmitting data message
04/03/1990US4914688 Modem system
04/03/1990US4914687 Voice information transmission system
04/03/1990US4914686 Cordless phone data logger
04/03/1990CA1267448A2 Communication system
03/1990
03/28/1990EP0360732A2 Facsimile telecommunications method
03/28/1990EP0360725A2 Method for application definition of telephone keys
03/28/1990EP0360724A2 Method for monitoring telephone status changes
03/28/1990EP0360723A2 Method of enhancing communication setup between a commmunication station and a telecommunications network
03/28/1990EP0360722A2 Method for monitoring call setup commmunications
03/28/1990EP0360721A2 Method and apparatus for high speed asynchronous communication
03/28/1990EP0360200A2 Communication apparatus utilizing a telephone line
03/27/1990US4912757 Paging system
03/27/1990US4912705 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/27/1990US4912552 Distributed monitoring system
03/27/1990CA1267207A1 Method and apparatus for automatically transmitting a message to a telephone terminal
03/22/1990WO1990003076A1 Method and apparatus for controlling transmission of voice and data signals
03/22/1990WO1990003074A1 System for the automatic notification of message reception in an electronic messaging system
03/22/1990WO1990001843A3 Remote dictation system using telephone line
03/21/1990EP0359723A2 Arrangement in equipment for the reproduction of voice message in telephone line
03/21/1990EP0358688A1 Method for dynamically allocating data channels on a trunked communication system.
03/21/1990CN2054960U Microcomputer communication interface
03/20/1990US4910768 Automatic balancing circuit for longitudinal transmission system
03/20/1990US4910763 Switching device for connecting a data transmission system to the telephone switched network
03/20/1990US4910610 Facsimile communication system
03/20/1990US4910607 Image processing device of multifunctional type
03/14/1990EP0357719A1 Marketing research system for obtaining retail data
03/14/1990CN1040474A Intelligent telephone-controlling system
03/13/1990US4908819 Integrated data voice multiplexer supporting handshake and loop-back protocols
03/08/1990WO1990002462A1 Method and device for the selective storage and transmission of information through a telephone line
03/08/1990WO1990002461A1 Data message waiting
03/08/1990WO1990002459A1 Data capable radio communication console
03/06/1990US4907254 Power source system for data terminal equipment
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