H04M 1 - Substation equipment, e.g. for use by subscribers

Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223)
01/1989
01/04/1989	EP0297549A2 Rapid processing of immediately successive arrival signals in a base station of a radio communication network
01/04/1989	CN2030398U Electronic communicator of carbon microphone
01/03/1989	US4796295 Telephone circuits
01/03/1989	US4796290 Ground start circuit
01/03/1989	US4796289 Multi-line network interface
01/03/1989	US4796288 Telephone handset with static discharge prevention
01/03/1989	US4796287 Digital loudspeaking telephone
12/1988
12/28/1988	EP0297023A2 Telephone handset
12/28/1988	CA1247765A Installation and system of installations with portable, wireless telephone sets
12/28/1988	CA1247705A Apparatus for transmitting and recording signals
12/27/1988	US4794642 Call screening in a public telephone station
12/27/1988	US4794638 Telephone answering machine display system
12/27/1988	US4794636 Method and apparatus for code matching the base and mobile unit of a cordless telephone set
12/27/1988	US4794489 Portable radio transceiver housing structurally supported by a battery
12/22/1988	DE3818137A1 Speed dialling keypad for a telephone
12/21/1988	EP0295570A2 Socket for connection of a telephone set
12/20/1988	US4792986 Portable radio system with externally programmable universal device connector
12/20/1988	US4792921 Data processing node
12/20/1988	CA1247267A1 Short range radiotelephone system having sets each usable simultaneously by several people
12/15/1988	WO1988010039A1 Auxiliary dialing system for mobile telephones
12/14/1988	EP0294417A1 Apparatus in a loudspeaking telephone set for supplying power to an amplifier connected to the loudspeaker.
12/14/1988	CN88212455U 驻极体电话送话器 Telephone electret microphones
12/14/1988	CN88204975U Earphone type telephone receiver
12/13/1988	US4791667 First dialed digit detector and comparator
12/13/1988	US4791664 System for selectively receiving telephone calls
12/13/1988	US4791659 Remote test telephone line access system
12/13/1988	US4791638 Signal processsing circuit for a telephone set
12/13/1988	US4791526 Mount of a printed circuit board arranged in a bipartite housing
12/13/1988	US4791244 Casing, particularly a junction-box casing for telecommunications engineering
12/13/1988	US4790769 Telephone modular jack
12/13/1988	US4790417 Brief case with a portable wireless telephone
12/07/1988	EP0294303A1 Circuit for a telephone set comprising a protection against voltage overloading
12/07/1988	EP0294233A2 Cordless telephone apparatus and a method of controlling same
12/07/1988	CN88202268U Telephone set
12/06/1988	US4790008 Telephone line switch apparatus
12/06/1988	US4790007 Telephone instrument
12/06/1988	US4790006 Method for electrically simulating a cradle switch and a hands free talking-loudspeaking key in a hands free talking-loudspeaking telephone station
12/06/1988	US4790002 Telephone device and method for operating a telephone device
12/06/1988	US4789213 Electro-optical modulator having a monomode light waveguide modulator
12/06/1988	CA1246262A1 Telephone unit adapted for vertical and horizontal mounting
12/06/1988	CA1246258A1 Modem with power-off ring detection
12/01/1988	WO1988009517A1 Electro-optical converter
12/01/1988	DE3716835A1 Circuit arrangement for a centrally powered telephone subscriber station
11/1988
11/30/1988	EP0293264A2 Telephone apparatus with a voice recognition system and operable in noisy environment
11/30/1988	EP0293259A2 Voice recognition system used in telephone apparatus
11/30/1988	EP0293258A1 Radio telephone apparatus
11/30/1988	EP0292916A1 Telephone system able to recognise one or more voices and to reply by furnishing information
11/30/1988	CN88102826A 音量范围控制电路 Volume range control circuit
11/29/1988	US4788720 Programmable subscriber set
11/29/1988	US4788717 Telephone line interface option module
11/29/1988	US4788715 Announcing waiting times in queuing systems
11/29/1988	US4788714 Remote controlling telephone unit for selectively activating one of a plurality of devices
11/29/1988	US4788713 One button control system for telephone answering device
11/29/1988	US4788712 Howler indicator in cordless telephone system
11/29/1988	US4788709 Facsimile communication terminal with memo pattern memory
11/29/1988	US4788708 Universal headset tester
11/24/1988	EP0268667A4 A telephone line monitoring system.
11/24/1988	DE3715580A1 Schaltungsanordnung zur ueberwachung einer fernsprechanschlussleitung Circuit arrangement for ueberwachung an automatic telephone connection cable
11/23/1988	EP0292342A1 System for the reciprocal analogous authentication between a terminal and a transmission line
11/22/1988	CA1245384A1 Surge protected electronic switch for telephone voiceband circuits
11/17/1988	WO1988009095A1 Wireless telephone equipment
11/17/1988	EP0290952A2 Speech control circuitry for a telecommunication terminal
11/17/1988	EP0290725A2 Method for approximately locating a mobile radio station
11/17/1988	EP0290489A1 Telephone structure.
11/17/1988	DE3715426A1 Telephone set for wall-mounted and desk-top operation
11/15/1988	US4785420 Audio/telephone communication system for verbally handicapped
11/15/1988	CA1244980A1 Telephone answering device with automatic return to incoming message mode
11/15/1988	CA1244979A1 Subscriber set programming module
11/15/1988	CA1244978A1 Single line telephone communication system
11/15/1988	CA1244977A1 Toll restriction circuit for an electronic telephone station
11/10/1988	DE3714310A1 Telephone system for a motor vehicle
11/08/1988	US4783844 Apparatus for transmitting and recording signals
11/08/1988	US4783822 Multi-adjustable headband
11/08/1988	US4783797 Telephone answering device and method having incoming voice message reproduction loudspeaker
11/03/1988	DE3713935A1 Circuit for ancillary telephone devices powered by the connection line
11/03/1988	DE3712571A1 Arrangement for multiple use of operating keys on telecommunications terminals, in particular telephone terminals
11/02/1988	EP0289296A1 Computer-based training for telephone extension users
11/02/1988	CN88102267A 电话机 Phone
11/01/1988	US4782528 Telephone apparatus
11/01/1988	US4782527 Telephone head/hand set
11/01/1988	US4782526 Telephone set
11/01/1988	US4782524 Telephone headset interface circuit
11/01/1988	US4782522 Terminal for a telecommunications switching system having an additional keyboard and/or visual display
11/01/1988	US4782521 Communication terminal call reminder with automatic dialing
11/01/1988	US4782520 Pulse receiver circuit providing longitudinal balance
11/01/1988	US4782516 Fraud prevention in a public telephone station
11/01/1988	US4782514 Key telephone system
11/01/1988	US4782510 Telephone answering machine with digital storage of announcements and messages
11/01/1988	US4781778 Vacuum drying to controlled moisture content; then heating until resin flows and seals fibers
11/01/1988	CA1244167A1 Automatic telephone answering and recording apparatus
10/1988
10/26/1988	EP0288169A2 Control system
10/26/1988	EP0287570A1 Telephone line interface option module
10/26/1988	CN87205429U Independance type automatic telephone answering and recording device
10/24/1988	EP0236432A4 Optical fiber bandwidth limiting method.
10/20/1988	WO1988008234A1 Telephone subset circuit arrangement
10/19/1988	EP0287511A1 Telephone set
10/19/1988	EP0287061A2 Apparatus for controlling calls in a mobile communication system
10/18/1988	CA1243357A1 Channel selection in a multichannel access radio communication system without occurrence of interference
10/12/1988	EP0285897A2 Local area network system
10/12/1988	EP0285749A2 Circuit arrangement for a telephone apparatus with a loudspeaker

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