Patents
Sitemap › H04 - Electric communication technique › H04M - Telephonic communication › H04M 1 - Substation equipment, e.g. for use by subscribers
Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223)
06/1991
06/19/1991CN1052405A Micro automatic revertive call switch mounted in telephone set
06/18/1991US5025466 Telephone test instrument
06/13/1991WO1991009483A1 Anonymous interactive telephone system having direct connect feature
06/13/1991WO1991008636A1 Isdn dual bus extension phone
06/13/1991WO1991008567A1 Limited vocabulary speech recognition system
06/12/1991EP0431552A2 Automatic subscriber calling device
06/12/1991EP0431540A2 Subscriber equipment witn a control device for switching the dialling method
06/12/1991EP0431539A2 Subscriber equipment for transmitting temporarily stored information via established connection of a communication network
06/12/1991EP0431096A1 Cellular telephone with standard telephone set
06/12/1991CN2078948U Telephone set with electronic sterilizing circuit
06/11/1991US5023936 Method and apparatus for externally defining the operational mode of a digital radio transceiver
06/11/1991US5023932 Radio communication system comprising a portable unit carrying out a battery saving operation related to a scanning operation of a fixed unit
06/11/1991US5023906 Method for monitoring telephone call progress
06/11/1991US5023905 Pocket data receiver with full page visual display
06/11/1991US5023903 Voice and data telecommunications apparatus
06/11/1991CA1284845C Communication system using unbalanced communication paths
06/07/1991CA2024170A1 Isdn dual bus extension phone system
06/05/1991EP0430605A2 Frequency detector based on a digital phase lock loop
06/05/1991EP0430353A2 Electronic telephone set protected against radiofrequency disturbances
06/05/1991EP0429571A1 Device for telecommunication systems
06/05/1991CN2078506U Telephone set with automatic disinfection function
06/05/1991CN1052016A Communications device with voice recognition and movable element control interface
06/05/1991CN1052015A Communications device with movable element control interface
06/05/1991CA2031181A1 Circuit for synthesizing an impedance across the tip and ring leads of a telephone line circuit
06/04/1991US5022075 Mechanical assembly for ensuring electrical safety in a telephone set or terminal
06/04/1991US5022068 Branched telephone system
06/04/1991US5022024 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
06/04/1991US5021783 Method for operating an apparatus for facilitating communications
05/1991
05/30/1991WO1991007859A1 Voice transmission system
05/30/1991WO1991007838A1 Remote access telephone control system
05/30/1991WO1991007837A1 Apparatus for removably connecting a cellular portable telephone to a computer
05/30/1991WO1991007786A1 Programmable cable switch
05/29/1991EP0429300A2 System of a plurality of terminal apparatuses respondent to a call in a predetermined order
05/29/1991EP0429202A2 Wireless telephone system
05/29/1991CN2078062U Recorder of telephone
05/29/1991CN2078061U Microphone clarifier of telephone
05/28/1991US5020136 Battery pack antenna suitable for use with two-way portable transceivers
05/28/1991US5020107 Limited vocabulary speech recognition system
05/28/1991US5020103 Adjustable height mounting pedestal for public and coin telephones
05/28/1991US5020101 Musicians telephone interface
05/28/1991US5020094 Cordless telephone network
05/28/1991US5020090 Apparatus for removably connecting a cellular portable telephone to a computer
05/28/1991US5020051 Duplex communications method and system
05/23/1991DE4033830A1 Display device for electronic calculator and car telephones - reduces character size according to number of characters to be displayed
05/22/1991EP0428448A1 Device for time-programming and for automatic transfer of the calls of a telephone subscriber line
05/22/1991EP0428254A2 Circuitry for verifying communicants in a communication apparatus
05/22/1991EP0427800A1 Interlock circuit for preventing corruption of telephone line signals.
05/22/1991EP0306520A4 Telephone call monitoring, metering and selection device
05/22/1991CN2077621U Full-automatic changeover calling device of bridging telephone
05/22/1991CN2077620U Telephone
05/22/1991CN2077619U Dialing number limiter of key telephone
05/21/1991WO1991007836A1 Communications device with movable element control interface
05/21/1991WO1991007835A1 Communications device with voice recognition and movable element control interface
05/21/1991US5018188 Microphone-controller with multifunction, single conductor
05/21/1991US5018185 Tamperproof pay telephone
05/21/1991US5018184 Automated channel test unit
05/17/1991WO1991007833A1 Identifying telephone controller system
05/17/1991CA2068893A1 Identifying telephone controller system
05/16/1991WO1991007042A1 Portable automated teller machine
05/16/1991WO1991007041A1 Called person identification in telecommunication
05/16/1991DE4015441C1 Pivotable holder for telephone subscriber's appts. - has base plate with clamps fixed to rotatable and/or pivotable support arm fixable to wall panel shelf, etc.
05/16/1991DE3937181A1 Electronic changeover circuit for telephone extensions - allows connection of 2 telephone extensions to one telephone line by detecting loop current of line in use
05/15/1991EP0427416A2 Sensing exchange signalling requirements
05/15/1991EP0427158A1 Battery saving method for portable pager
05/15/1991EP0426664A1 Adjustable telephone handset cradle
05/15/1991CN2077174U Face plate-changing telephone set
05/14/1991WO1991007715A2 Data entry book with sheet identification
05/14/1991US5016003 Environmental control system for the handicapped
05/14/1991US5014959 Closures
05/14/1991CA2068409A1 Data entry book with sheet identification
05/14/1991CA1284184C Combined chassis retention and electrical contact arrangement
05/14/1991CA1284183C Portable radio telephone having power saver
05/14/1991CA1284113C Method and device for recording and replaying audio communications
05/10/1991WO1991007839A1 Computer and telephone apparatus with user friendly computer interface and enhanced integrity features
05/08/1991EP0426584A1 Device for detecting the lifting of a telephone handset
05/08/1991EP0426451A2 Cordless telephone apparatus
05/08/1991DE3937003A1 Mobile radio telephone - has built-in miniaturised tape recorder for messages or direct recording
05/08/1991CN2076729U Multifunctional collinear apparatus for telephone
05/07/1991US5014347 Field telephone system
05/07/1991US5014302 Telephone
05/07/1991US5014297 Telephone answering device with automatic return to incoming message mode
05/07/1991US5014296 Facsimile terminal device having voice message recording capability
05/07/1991US5014295 Multi-channel access cordless telephone system
05/07/1991US5014294 Speakerphone for cellular telephones with howl prevention, detection, elimination and determination
05/07/1991US5014269 Microcomputer integrating a digital subscriber terminal for an integrated service digital network
05/07/1991US5014168 Radio-light fixture
05/07/1991US5013877 Devices for electrical connection
05/02/1991EP0424880A2 A communication system comprising a called receiver and a communication apparatus
05/02/1991EP0424508A1 Dialing features for cellular telephone with standard telephone set
05/02/1991EP0424495A1 Voice messaging for pay phone telephone systems.
05/02/1991DE4008885C1 Telephone subscriber's installation with plug-in extensions - has timed circuits in sockets holding connection so that plug can be removed and inserted in other socket
05/02/1991DE3935679A1 Telephone handset with curved gripper - has flat strap, whose end sections are angled in common plane
04/1991
04/30/1991US5012513 Telephone handset cover
04/30/1991US5012508 Telephonic speech training device
04/25/1991DE4033829A1 Service info. system e.g. for hotel booking or aircraft navigation - has map and service data storage devices accessed by computer controlled by selection device
04/25/1991DE3934965A1 Telephone answering machine - includes code recognition circuitry and memories to allow remote access of stored data
04/24/1991EP0424034A2 Telephone Lock
04/24/1991EP0423733A2 Support device for the mobile unit of a cordless or mobile telephone
04/24/1991EP0423202A1 Headphone with microphone.
04/24/1991EP0423131A1 Personal signalling telephone
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