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)
11/1991
11/08/1991WO1991017598A1 An overvoltage and overcurrent protective circuit with high earth balance
11/08/1991CA2078696A1 Overvoltage and overcurrent protective circuit with high earth balance
11/06/1991EP0455157A2 Facsimile apparatus
11/06/1991EP0454884A1 Telephone exchange, in particular a private branch exchange with a central stored program computer control
11/05/1991US5063595 Optical communications network
11/05/1991US5063590 Acoustic coupler and data transmission apparatus using the same
11/05/1991US5063587 Transmission system for still-picture tv telephone
11/05/1991CA1291834C Registration of a new cordless telephone to an existing system
10/1991
10/31/1991DE4013961A1 Building internal telephone installation - has one or more stations with access to exchange line and common entrance-door station for security
10/30/1991EP0454452A2 Data communication apparatus
10/30/1991EP0454421A2 Improvements relating to telecommunications equipment
10/30/1991EP0454387A2 Data communication apparatus with pre-recorded telephone numbers
10/30/1991EP0454316A2 Data terminal for communicating over a telephone circuit
10/30/1991EP0454247A2 ISDN subscriber circuit and interface to be used therefor
10/30/1991CN2087850U Transmission device of telephone for human body electrical signal
10/29/1991US5062104 Digital service unit for connecting data processing equipment to a telephone system based computer network
10/29/1991US5061992 Tv phone communication system and apparatus therefor
10/29/1991US5061991 Emission-reception system for the transmission of animated color pictures and sound from two independent channels
10/29/1991US5061916 Event driven remote graphical reporting of building automation system parameters
10/24/1991CA2040807A1 Data terminal for communicating over a telephone circuit
10/23/1991EP0452865A2 Facsimile apparatus comprising cordless telephone set
10/23/1991EP0452864A2 Facsimile apparatus comprising cordless telephone set
10/23/1991EP0452860A2 Facsimile apparatus comprising cordless telephone set
10/22/1991US5060257 Videotex terminal for receiving telecopies
10/17/1991WO1991015916A1 Automatic system for the playback of recorded spoken messages through a telephone line
10/17/1991WO1991015915A1 Facsimile device having audio response function
10/17/1991WO1991015913A1 Composite telephone set
10/17/1991WO1991015818A1 System for searching and retrieving data from data bases via audio access with automatic faxing of results
10/17/1991CA2040550A1 Synthesized speech terminal system for data communication
10/16/1991EP0451696A2 Video phone unit
10/16/1991EP0451288A1 Data collection/transmission device and data collection system
10/15/1991US5058134 Process of synchronizing a receiving modem after a training on data
10/15/1991US5057941 Facsimile device
10/14/1991CA2025944A1 Automatic meter reading system with multitasking control
10/09/1991EP0451056A1 Telephonic electronic device
10/09/1991EP0450610A2 Telecommunications voice and data services network architecture
10/09/1991EP0450062A1 Data and voice transmission over a cellular telephone system
10/09/1991EP0224556B1 Ensemble modem structure for imperfect transmission media
10/08/1991US5056133 Data communication apparatus coupled to two telephone lines
10/08/1991US5056132 Switch device adapted to interface between an incoming telephone line and an internal telephone system
10/08/1991CA1290475C Integrated data voice multiplexer supporting handshake and loop-back protocols
10/08/1991CA1290432C Elimination of false requests for telephone operator assistance
10/03/1991WO1991015077A1 Control device for a subscriber device for automatic switching of the type of communication
10/03/1991WO1991015074A1 Telephone-switched network, automatic meter-reading system based upon service address
10/02/1991DE4008968A1 Steuereinrichtung fuer eine teilnehmereinrichtung zum automatischen umschalten der kommunikationsart Control means for a subscriber device to automatically switch the communication
10/01/1991US5053766 Telemetering system for electrical power consumed by various users
09/1991
09/29/1991WO1991015067A1 Method for embedding information in modem handshake procedure and modems incorporating the same
09/26/1991DE4009487A1 Telephone peripheral device - provides alarm signalling with switching of multifrequency selection coder to alarm signal tone mode
09/25/1991EP0448312A2 Shared facsimile-telephone communication device
09/25/1991EP0448076A2 Automatic personal search telephone system
09/24/1991US5052037 Video telephone employing pulse width modulation for data transmission
09/24/1991US5051720 Remote control system using power line of remote site
09/19/1991WO1991014160A1 Self-contained apparatus for measuring or counting, processing and remote transmission of data
09/18/1991CN2085120U Automatic siren of telephone
09/17/1991US5050208 Relaying destination and designation system
09/17/1991US5050005 Facsimile apparatus
09/17/1991CA1289279C Communication system
09/11/1991EP0445532A1 ISDN multimedia communications system
09/11/1991EP0365649A4 Apparatus and method for mapping the connectivity of communications systems with multiple communications paths
09/10/1991US5048078 System for communication over a telephone line between a facsimile apparatus and a computer
09/10/1991US5048077 Telephone handset with full-page visual display
09/10/1991US5048076 Control apparatus for an automated telephone attendant
09/10/1991US5048075 Telephonic-interface statistical analysis system
09/10/1991US5048072 Still picture transmission device
09/05/1991WO1991013510A1 Communications network and communications device
09/04/1991EP0444644A2 Transmission input/output device with reduced power consumption
09/04/1991CN2084258U Telephone with automatic alarm
09/04/1991CN2084257U Triggering type phonetics calling alarm
09/03/1991US5046189 Facsimile apparatus and method of transmitting management information
09/03/1991US5046083 Entrance communication system
09/03/1991US5046082 Remote accessing system for cellular telephones
08/1991
08/29/1991DE4006048A1 Communication system interconnecting subscriber terminals - has terminal of one subscriber serviceable independently of state of terminal of other subscriber
08/28/1991CN1054164A Computer and telephone apparatus with user friendly computer interface and enhanced integrity feature
08/27/1991US5043721 Paging accessory for portable information/computing devices
08/27/1991CA1288153C Response system of a terminal to an incoming call
08/22/1991WO1991013515A1 Video telephone system
08/22/1991CA2076364A1 Video telephone system
08/21/1991EP0442041A2 Integrated digital signal processor/general purpose CPU with shared internal memory
08/21/1991CN1013632B Baseband data transmission method and computer local area net in telephone exchange
08/14/1991EP0441055A2 Method and apparatus for reducing the turn-around time in facsimile transmission
08/13/1991US5040208 Coordinated voice and data display having temporary storage of transaction data
08/13/1991US5040206 Communication apparatus having driving mechanism and speaker-phone
08/13/1991US5040190 Analog data station terminal
08/08/1991DE4003091A1 Supplementary heater remote switching for motor vehicle - is effected by external call to radiotelephone transceiver equipped with acoustic or optical coupler and decoder
08/08/1991DE4002862A1 Broadband PABX for video, audio and data communication - includes narrow band-broadband signalling adaptor modules and connection computer for control of broadband switch matrix
08/07/1991EP0440515A1 International authorization system
08/07/1991EP0440190A2 Modem having speed notifying means
08/07/1991EP0440099A2 Message receiving apparatus
08/07/1991EP0440063A2 Broadband pabx
08/07/1991CN2082495U 报警电话机 Telephone alarm
08/07/1991CN1013466B Digital key telephone system
08/07/1991CN1013465B Method and apparatus for data communication
08/07/1991CA2034159A1 Method and apparatus for reducing the turn-around time in facsimile transmission
08/06/1991US5038374 Data transmission and storage
08/06/1991US5038373 Public dial telephone system
08/06/1991US5038372 Systems for transmitting data via telephone lines
08/02/1991CA2035376A1 Broadband private automatic branch exchange
08/01/1991DE4035400A1 Call-back control using cordless personal paging system - holds call-back request in memory for prompt compliance after initial paging attempt is not acknowledged
07/1991
07/31/1991EP0438397A1 A remote supervision system
07/31/1991CN2082053U Telephone for alarm
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