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)
09/1991
09/18/1991EP0447302A1 Time-multiplexed radio communication device
09/18/1991EP0447212A1 Voice and video communication apparatus
09/18/1991EP0446297A1 Two-way radio with voice storage
09/18/1991CN2085118U Automatic recording message device for telephone
09/18/1991CN2085117U Emergency calling device of dispatching telephone for mine
09/17/1991US5050234 Method for connecting a channel between a base station and a mobile station
09/17/1991US5050211 Safety interlock
09/17/1991US5050209 Telephone set
09/17/1991US5050207 Portable automated teller machine
09/17/1991US5050206 Telephone system responsive to a command incoming during message reproduction
09/17/1991US5050160 Training method for an echo canceller for use in a voice conference system
09/17/1991US5049083 Universal joint for telephone use
09/17/1991CA1289284C Security handset
09/17/1991CA1289278C Telephone apparatus
09/16/1991WO1991014330A1 Telephone call detecting circuit and a method of remotely accessing and testing a telephone
09/16/1991CA2077747A1 Telephone call detecting circuit and a method of remotely accessing and testing a telephone
09/14/1991CA2037951A1 Telephone test instrument
09/13/1991CA2037716A1 Automatic area code dialing apparatus
09/11/1991EP0445887A2 Method of optimising the transmission of idle beacon messages in a communications system and a communications system operable in accordance with the method
09/11/1991EP0445808A1 Radio telephone apparatus
09/11/1991EP0445452A1 Telephone answering and paging system
09/11/1991EP0445376A1 Connector
09/11/1991EP0445375A1 Method of in-house voice and data communication via the home power distribution network
09/11/1991EP0365649A4 Apparatus and method for mapping the connectivity of communications systems with multiple communications paths
09/11/1991CN2084689U Health paper stuch on microphone
09/11/1991CN2084688U Telephone set with photoelectric high voltage protector
09/11/1991CN2084646U Super small communication insulation isolated transformer and its device
09/10/1991US5048091 Talker speech level control circuit for telephone transmitter by piezoelectric conversion
09/10/1991US5048077 Telephone handset with full-page visual display
09/10/1991US5048076 Control apparatus for an automated telephone attendant
09/10/1991US5048074 Electronic apparatus for "hands off" control of a voice mail system
09/10/1991US5048073 Telephone line switching interface unit
09/10/1991CA2037557A1 Method for in-house voice and data communication through the in-house power supply
09/05/1991DE4005783A1 Telephone earpiece holder - allows free movement of head without earpiece moving away from ear
09/04/1991EP0444644A2 Transmission input/output device with reduced power consumption
09/04/1991EP0444052A1 Integrated data transmission computer and system
09/04/1991CN2084256U Telephone capable of self distinfecting
09/04/1991CN2084255U Sterilization piece for mouthpiece of telephone
09/03/1991US5046131 Portable radio transceiver apparatus
09/03/1991US5046125 Lock control method for on-board terminal equipment of a mobile telecommunications system
09/03/1991US5046081 Radio telephone with variable attenuator for controlling modulated signal
09/03/1991US5046079 Telephone answering device with TV telephone
09/03/1991US5045849 Access device for an ISDN connecting device of a public terminal
09/03/1991US5045327 Digital recording and playback module system
09/03/1991US5044987 Mounting plate for telecommunications wall outlet
09/03/1991CA1288533C Recording telephone system equipped with a remote control change-overswitch
08/1991
08/28/1991WO1991013507A1 Portable telephone
08/28/1991EP0443721A2 Cordless telecommunications apparatus
08/28/1991EP0443562A2 Cordless telephone
08/28/1991EP0443189A2 Data transmission system with a subscriber equipment for forwarding call signals or data to a radio receiver
08/28/1991CN2083814U Illegal telephone installation alarm device
08/28/1991CN2083813U Computer controlled recording telephone device
08/28/1991CN2083812U Multi-function telephone automatic calling device
08/28/1991CN2083811U Press key telephone with electronic caculator
08/28/1991CN1054164A Computer and telephone apparatus with user friendly computer interface and enhanced integrity feature
08/27/1991US5044010 Arrangement and method for selecting an available communication channel for a cordless telephone
08/27/1991US5043721 Paging accessory for portable information/computing devices
08/27/1991CA1288186C Device for performing the "hands-free" function in a telephone set association the gain switching and echo suppression functions
08/27/1991CA1288152C Fraud prevention in a public telephone station
08/22/1991WO1991012685A1 Multiple called-party telephone and answering machine system
08/22/1991WO1991012682A1 Programmable telephone
08/22/1991DE4029397A1 Answering machine with different texts for each of two telephone lines - uses different tape tracks for calls on different lines only after call checks
08/22/1991DE4005485A1 Switch hook device for telephone kiosk - uses spring and plunger to provide switching function
08/22/1991DE4005076A1 Overvoltage protection for data processing appts. - has common board with overvoltage protection members, and terminal for supply and data sides
08/21/1991WO1991013508A1 A method for active feedback suppression
08/21/1991EP0442467A2 Dealing board with telephonic functions
08/21/1991CN2083364U Microjunctor of dial telephone
08/21/1991CN2083362U Interface circuit board for magneto exchange
08/20/1991US5042071 Acoustic insulator for a telephone handset microphone
08/20/1991US5042066 Dialer circuit
08/20/1991US5042063 Telephone apparatus with voice activated dialing function
08/20/1991US5042050 Digital cordless telephone systems
08/20/1991CA1287925C Touch screen form entry system
08/20/1991CA1287887C Speakerphone using digitally compressed audio to detect acoustic feedback
08/18/1991CA2036225A1 Telecommunications apparatus
08/18/1991CA2036090A1 Telecommunications apparatus
08/15/1991WO1991012698A1 Radio having removable memory means for storing radio user validation code
08/14/1991EP0441433A1 Pivotable coupling for a hook arm of a telephone apparatus
08/14/1991DE4003820A1 Wireless digital telephone system base station emulator - initiates synchronisation for assigning time slots to subscriber station within frame pattern of signal using positive edges
08/14/1991DE4003791A1 Strip cable connector for telephone handset - has cable inner cores intersecting at one or several points
08/14/1991CN2082931U Controller for 2 sets of party-line telephones with security
08/14/1991CN2082930U Plug connected wiring boxes for telephones
08/14/1991CN1053872A Device used for secondly dialing with speech
08/13/1991US5040206 Communication apparatus having driving mechanism and speaker-phone
08/13/1991US5040205 Multi-channel cordless telephone system with a plurality of handset units and base units
08/13/1991US5040204 Cordless telephone apparatus
08/08/1991WO1991011875A1 Autodial from database in an electronic wristwatch
08/07/1991EP0440473A2 Ringing circuit and method for use in a portable telephone set
08/07/1991EP0440439A2 Method and system for controlling an external machine by a voice command
08/07/1991EP0439927A2 Enhanced privacy feature for telephone systems
08/07/1991EP0439641A1 Method and device for forming the line termination of a telephone line
08/07/1991EP0426664A4 Adjustable telephone handset cradle
08/07/1991CN2082491U Automatic disinfection apparatus for telephone
08/06/1991US5038375 Circuit arrangement for preventing gain from responding to frequency variation despite the presence of an isolation transformer
08/06/1991US5038372 Systems for transmitting data via telephone lines
08/06/1991US5038253 Transceiver mounting assembly having integrally formed lock
08/06/1991CA1287374C Vehicle telephone with call answering and recording means
08/02/1991WO1991011873A1 Speakerphone for cellular telephones with howl prevention
07/1991
07/31/1991WO1991011888A1 Key telephone device
07/31/1991EP0439340A2 Portable radio telephone set
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