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)
01/1991
01/03/1991DE3920721A1 Telephone terminal operation with data indication - involves initialising by transmission of specific dial signal to exchange
01/02/1991EP0405783A2 Burst mode transmitter/receiver unit
01/02/1991EP0405714A2 Self-powered base and remote telephone communication set
01/02/1991EP0405394A2 Subscriber equipment for transmitting temporarily stored data to a paging receiver fitted with an acoustical and/or optical output device
01/02/1991EP0405029A1 Speech communication system and method
01/02/1991CN1048292A 电话机 Phone
01/01/1991US4982442 Low cost antenna switch using relays configured in a transmit/receive arrangement
01/01/1991US4982427 Integrated circuit for telephone set with signal envelope detector
01/01/1991US4982425 Hands-free telephone
01/01/1991US4982424 Telephone having receive call indicating function and mute/light key
01/01/1991US4982423 Data storage apparatus
01/01/1991US4982420 Recording system with response categorization
01/01/1991US4982401 Method and apparatus for detecting transmission errors in cordless telephones
12/1990
12/31/1990CA2018510A1 Self-powered base and remote telephone communication set
12/29/1990CA2019266A1 Burst mode transmitter/receiver unit
12/27/1990EP0404746A2 A portable-telephone mounting bracket
12/27/1990EP0404502A2 Voice recognition dialing unit
12/27/1990EP0404452A2 System utilizing portable device
12/27/1990EP0404451A2 System utilizing a portable device for generating a telephone call
12/27/1990EP0404084A1 Telephone apparatus
12/27/1990EP0403923A1 Telephone device for connection to several telephone lines
12/27/1990EP0403701A1 Combination headset having adjustable means for positioning speakers to combine ambient and speaker sounds
12/27/1990EP0403584A1 Process for establishing a connection between a fixed and several mobile elements in a cordless telephone system.
12/26/1990CN1011021B Announcement storage system for telephone answering machine
12/26/1990CN1011020B Telephone
12/25/1990USRE33507 Cordless telephone with automatic telephone answering/recording function
12/25/1990US4980911 Transient signal elimination circuit for telecommunications applications with CPU control means
12/25/1990US4980910 Portable automatic dialing unit
12/25/1990US4980585 Method and apparatus for synthesizing digital waveforms
12/22/1990CA2019563A1 Telephone
12/20/1990DE3919825A1 Pulse-dependent accessory connectable to telephone coupler - is pluggable to coupler by electric and fixed mechanical terminal pins
12/20/1990CA2006919A1 Portable-telephone mounting bracket
12/19/1990EP0403204A2 Cordless telephone systems and methods of operation
12/19/1990EP0403203A2 Communication systems
12/19/1990EP0403151A2 Mobile telephone device adapted for carrying out an aging operation
12/19/1990EP0402969A2 Pilot circuit for electrodynamic or piezoceramic receiving telephone capsules
12/19/1990EP0247088B1 Portable radio battery pack with on-off switch
12/19/1990CN2067880U Automatic, power supply, secret telephone extension
12/19/1990CA2019166A1 Telephone apparatus adapted to be connected to several telephone lines
12/18/1990US4979214 Method and apparatus for identifying speech in telephone signals
12/18/1990US4979208 Method and apparatus for electronic payphone open switch interval management
12/18/1990US4979205 Cordless telephone
12/18/1990US4979094 For controlling electrically powered domestic equipment in a dwelling
12/18/1990CA1278122C Message transferring telephone set and method
12/16/1990CA2018926A1 Cordless telephone systems and methods of operation
12/16/1990CA2018925A1 Communication systems
12/13/1990WO1990013198A3 Device for transmitting information
12/13/1990DE3918923A1 Selective call protection at microprocessor-controlled telephone - involves recognition of code number sent by caller to additional receiver which may instigate alternative response
12/12/1990EP0401916A2 Identification search for telecommunication devices
12/12/1990EP0401915A2 Identification exchange between telecommunication devices
12/12/1990EP0401849A2 Apparatus for referring to a content of a dial memory in a telephone set
12/12/1990EP0401804A2 Facsimile device
12/12/1990EP0401479A2 Support for telephone or similar apparatus
12/12/1990EP0401345A1 Solderless connecting block
12/12/1990EP0393059A4 Method for terminating a telephone call by voice command
12/11/1990US4977619 Distributed infrared communication system
12/11/1990US4977611 Portable radio apparatus having battery saved channel scanning function
12/11/1990US4977592 Dispenser and unlatching mechanism for a hand-held pay station telephone
12/11/1990US4977590 Signal level expansion apparatus as for a telecommunications system
12/11/1990US4977299 Double action switch
12/11/1990CA1277792C Automatic telephone answering apparatus and method
12/11/1990CA1277790C Mobile communications system capable of avoiding interference with control channel
12/11/1990CA1277758C Communications device for building entrances
12/11/1990CA1277751C Packet buffer memory control for statistical multiplexing
12/11/1990CA1277750C Time stamping for packet system nodes
12/05/1990EP0401007A2 Headphone-convertible telephone headset
12/05/1990EP0400264A2 Security lock for electrical equipment
12/05/1990EP0227800B1 Telephone line interface circuitry for telecommunications equipment
12/05/1990CN2067048U Sterilizing pad for telephone
12/05/1990CN1047595A Apparatus for telecommunication
12/04/1990USRE33474 Optical fiber bandwidth limiting method
12/04/1990US4975967 Earplug for noise protected communication between the user of the earplug and surroundings
12/04/1990US4975949 Electronic headset telephone
12/04/1990US4975948 Rapid dialing method for telecommunications
12/04/1990US4975943 Telephone set having outbound call restriction logic circuit
12/04/1990US4975942 Credit/calling card pay telephone method and system employing telephone unit local card-checking and other intelligence cooperative with local personal host computer
12/04/1990US4975940 Telephone ringing adapter for operating upon reception of a preset number of calling signals
12/03/1990CA2018030A1 Holding device for telephones or the like
11/1990
11/29/1990WO1990014737A1 Piezoceramic transducer for telephone instruments
11/29/1990DE3928706C1 Telephone subscribers appts. installation with extension - having own operating appts. intrinsically-safe battery and separated by converter enabling working in explosion risk environment
11/29/1990DE3917317A1 Portable radio telephone with handle on housing - has handle releasably secured, with groove at one end engaging axis on housing
11/29/1990DE3917296A1 Electric hybrid circuit for telephone installations - has electronic changeover switch for transmitter and receiver coupling to two=wire line
11/28/1990EP0399759A2 An automatic telephone answering apparatus
11/28/1990EP0399612A2 Data transmission over a time division duplex channel
11/28/1990EP0399611A2 A communications system for data transmission over a time division duplex frequency channel
11/28/1990EP0399610A2 Improvements in or relating to digital cordless telephone systems
11/28/1990EP0399520A2 A radio communication system
11/28/1990EP0399176A2 Construction of a telephone handset operating as an independent unit
11/28/1990CN2066639U Eliminator for private toll call
11/27/1990US4974258 Vandal-proof handset for a pay telephone
11/27/1990US4974253 System and method for controlling facsimile apparatus in response to a computer generated signal or a CNG signal
11/27/1990US4974251 Cordless telephone system
11/27/1990CA1277052C Modular assembly as a monitor for a telephone answering machine
11/27/1990CA1277050C Snap-on network interface unit
11/26/1990CA2017551A1 Hearing assist telephone
11/22/1990EP0398711A2 Telephone with abbreviated dialling function
11/22/1990EP0398212A1 Telephone handset
11/22/1990DE4016106A1 Telephone set for hostile environment - uses handset to cover pushbutton keys, with fitting into shaped recess
11/22/1990DE4015807A1 Connector box with housing and lid - has top microphone and control element covering cowl of plastics, with reduced width side walls
11/21/1990CN2066213U Electronic brain answering and recording telephone device
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