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)
10/1985
10/08/1985US4546214 Line use indicator for telephone sets sharing a single line
10/08/1985CA1195019A1 Additional line coupling circuit to an intercom telephone set
10/08/1985CA1195018A1 Line circuit
10/02/1985EP0156297A2 Mobile apparatus for radio transmission
10/02/1985EP0026187B1 Communication system tracking arrangement
10/01/1985US4544808 Telephone indicator
09/1985
09/26/1985WO1985004301A1 Telephone aid
09/25/1985EP0155740A2 Loudspeaking telephone instrument
09/25/1985EP0155739A2 Loudspeaking telephone instrument
09/24/1985US4543665 Speakerphone with wireless infrared microphone
09/24/1985US4543452 Apparatus for the storing and recovery of information, subscriber's numbers, subscriber's addresses, etc.
09/24/1985US4543451 Seat for a cordless telephone
09/24/1985CA1328501B Security System for SSTV Encryption
09/24/1985CA1194245A1 Multi-tone signal generator
09/24/1985CA1194212A1 Security system for sstv encryption
09/17/1985US4542262 Subscriber telephone station
09/17/1985CA1193775A1 Electronic common switch
09/17/1985CA1193700A1 Combined handset and headset arrangement
09/11/1985EP0154394A1 Switch operating mechanism
09/11/1985EP0154366A1 Audio transmission circuit comprising a transmit amplifier in the form of a line voltage stabiliser
09/11/1985EP0154288A2 Method of transmitting terminating call signals within a restricted duration and a base station and a portable unit for use in the same
09/10/1985US4540856 Remote control system
09/10/1985US4540855 Detecting signals within a passband on a telephone line
09/10/1985CN85200685U A handset with a transmitter/receiver transducer mounted in the bese
09/04/1985EP0153819A2 Telephone handset for a telephone set
09/03/1985US4539552 Digital-to-analog converter
09/03/1985CA1192993A1 Television/telephone system with automatic dialing
08/1985
08/29/1985WO1985003828A1 Communication system having dynamically assigned station set buttons
08/28/1985EP0153140A1 Communication system having dynamically assigned station set buttons
08/27/1985US4538029 Apparatus for use with key telephone system with wireless telephone device
08/27/1985US4538028 Apparatus for use with key telephone system with wireless telephone device
08/20/1985US4536888 Voice communication instrument system with line-powered receiver conditioning circuit
08/20/1985US4536624 Telephone answering machine interface circuit
08/20/1985US4536622 Remote telephone on-hook, off-hook control and indication circuit
08/20/1985US4536621 Dual talk path key telephone
08/20/1985US4536620 Master unlock circuit for an electronic telephone
08/20/1985US4536619 Ringing signal detection circuit
08/20/1985US4536616 Microphone or mouthpiece signal suppression circuit
08/20/1985CA1192325A1 Simplified line switch for a telephone set
08/20/1985CA1192324A1 Subscriber telephone set provided with protective devices against overvoltage
08/20/1985CA1192323A1 Telephone system with computer generated dial pad and automatic dialing
08/15/1985WO1985003613A1 A circuit board assembly, a handset and a method of producing a circuit board assembly for a handset
08/14/1985EP0151168A1 Telephone trunk barring device
08/13/1985US4535454 Multifrequency tone distribution using a conferencing arrangement
08/13/1985US4535204 Telephone dialling system
08/13/1985US4535202 Loop-circuit for telephone line
08/13/1985US4535200 Cordless telephone system with security coding
08/13/1985US4534614 Aspherical lens for concentrating diffuse optical radiation
08/07/1985EP0150886A2 Peritelephone system for telephone set and peritelephone pieces of apparatus
08/07/1985EP0150524A1 Arrangement for timed loop interruption by means of a telephone set
08/07/1985EP0150376A1 Base station for the reception of a wireless rechargeable telephone
08/07/1985EP0150349A2 Telephone handset
08/07/1985EP0150183A1 Method and apparatus for providing call tracing service.
08/06/1985US4533805 Manual operating device for a slide type electrical device
08/06/1985US4533791 Input/output device arrangements for terminals
08/06/1985CA1191643A1 Telephone apparatus
07/1985
07/31/1985EP0149637A1 Cradle contact device for a telephone with a push-button set
07/30/1985US4532380 Tone signalling adapter for a telephone set
07/30/1985US4532378 Telephone apparatus capable of inputting character data
07/24/1985EP0149096A2 Cassette for the current supply of a cordless telephone
07/24/1985EP0148836A1 Method and apparatus for sending a data message to a selected station during a silent interval between ringing.
07/23/1985US4531034 Key switch devices with indicator lamp means
07/23/1985CA1190984A1 Arrangement for avoiding undsirable oscillations in a closed-loop system and loud-speaking telephone set employing this arrangement
07/17/1985EP0148808A2 Telephonic keyboard protected against overload
07/17/1985EP0148651A1 Low-energy consumption transmitter-receiver for a two-way link
07/17/1985EP0148458A2 Address encoding system for portable battery - operated devices
07/16/1985US4530047 Dual registry digital processor system with external memory interface
07/16/1985US4529846 Dynamic telephone receiver with magnetic shunt
07/16/1985US4529845 Optical coupling interface circuit for telephone line ringing signal indication or detection
07/16/1985US4529844 Pulse output telephone system with ring tap elimination
07/16/1985US4529843 Subscribers telephone hold circuit with automatic disconnect
07/16/1985CA1190683A1 Voice communication instrument system with line- powered receiver conditioning circuit
07/16/1985CA1190679A1 Dial pulsing circuit
07/10/1985EP0147791A2 Dual-tone multiple-frequency-signal generating apparatus
07/09/1985US4528426 Directional microphone assembly
07/09/1985US4528424 Multiparty line adapter with privacy feature controlled by reversal of line polarity at a central power source
07/03/1985EP0146814A2 Cordless telephone
07/02/1985US4527018 Support for a one-piece telephone
07/02/1985US4527016 Current regulated pulse dialer with memory retention circuit
07/02/1985US4527014 Loudspeaking telephone
06/1985
06/26/1985EP0146185A2 Telephone circuit comprising a class-B amplifier
06/26/1985EP0146183A1 Interface arrangement for a subscriber set
06/25/1985US4525835 Duplex radio system utilizing time compression expansion
06/25/1985US4525603 Ring and line monitor for answering machine
06/25/1985US4525600 Automatic telephone answering device
06/20/1985WO1985002738A1 Portable telephone id code transfer system
06/19/1985EP0145097A2 Duplex speech transmission method and a system therefor
06/18/1985US4524384 Video and audio security system
06/18/1985US4524249 Keyboard switch assembly
06/12/1985EP0144048A2 Hook switch for a telephone apparatus
06/11/1985US4523307 Power line carrier multi telephone extension system for full duplex conferencing and intercom between telephones
06/11/1985US4523057 Subscriber's telephone instrument circuit
06/11/1985US4523056 Telephone including resistive array for dialing and system for using such telephone
06/11/1985US4522339 Irrigation fitting with installation barb and associated barb installation tool
06/11/1985CA1188831A1 Telephone indicator
06/05/1985EP0143481A1 DTMF-telephone set with multiple use of the logic of the digital tone generator
06/04/1985US4521648 Automatic dialer for telephone numbers
05/1985
05/29/1985EP0143095A2 Method for producing in wood a case for a telephone apparatus, a hand microtelephone or some other casing used within the telecommunications industry
05/29/1985EP0143094A2 Plate
05/28/1985US4520233 Telephone line security apparatus
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