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)
07/1991
07/31/1991EP0439139A2 Arrangement and method for rapidly detecting double talk in long distance telephone communications system
07/31/1991EP0439065A2 Subscriber set with a buffer memory and abbreviated dialling function
07/31/1991EP0438670A2 Light emitting type push button for telephone sets
07/31/1991EP0438669A2 Telephone set fitted with a hinged cover
07/31/1991EP0407427A4 Improvements relating to telephone handsets
07/31/1991CN2082052U Mutual exclusion device for party-line telephones
07/31/1991CN2082051U Detector for illegal facsimile equipment
07/31/1991CN1053521A Telephone automatic calling device
07/31/1991CN1053510A Superminiature communication insulated isolation transformer and device thereof
07/30/1991US5036538 Multi-station voice recognition and processing system
07/30/1991US5036536 Electret microphone transmitter for use in telephone circuits
07/30/1991US5036534 Intelligent telephone interface for automatic answering systems, and method of using
07/30/1991US5035005 Inflight headset for civil aircraft
07/25/1991WO1991011069A1 Public access facsimile system
07/25/1991WO1991011067A1 Telephone call responding system and control method and device therefor
07/25/1991WO1991011065A1 Method of and apparatus for controlling modulation of digital signals in frequency-modulated transmissions
07/25/1991DE4107913A1 Recorded telephone message transmission to portable tape recorder - is sent over digital link to distant telephone set with MODEM access to digital memory of portable appts.
07/25/1991DE4001837A1 Cable reeling device with finger esp. for telephone - has cable guidance roller mounted on end of finger which revolves bidirectionally about axis of drum
07/25/1991DE4001412A1 Cordless telephone with circuit signalling battery replacement - has base station prevents transmission of noise to subscriber loop until mobile appts. is reactivated
07/25/1991CA2074169A1 Method of and apparatus for controlling modulation of digital signals in frequency modulated transmissions
07/24/1991EP0438137A2 Radio telecommunication apparatus
07/24/1991EP0438094A2 Device for operating cordless telephones
07/24/1991EP0437489A1 A multi-purpose communications device
07/24/1991CN2081616U 电话机复位开关 Telephone reset switch
07/24/1991CN2081615U Telephone dial pulse receiver
07/24/1991CN2081614U Multi-functional key type electronic telephone set
07/23/1991USRE33647 Apparatus for anchoring a telephone handset to a telephone housing
07/23/1991US5034979 Earring adapter for telephone
07/23/1991US5034977 Phase accumulation dual tone multiple frequency generator
07/23/1991US5034976 System for registering data into a memory
07/23/1991US5034734 Small-sized equipment capable of automatically changing the visual angle of its liquid crystal display
07/23/1991US5033709 Holding device
07/23/1991US5033707 Holder for office equipment
07/23/1991CA1286813C Apparatus for anchoring a telephone handset to a telephone housing
07/23/1991CA1286810C Loudspeaker apparatus and method for a radio telephone apparatus
07/23/1991CA1286809C Method and circuit for setting dialing data in a wireless telephone
07/19/1991CA2034087A1 Acoustic insulator
07/19/1991CA2008177A1 Method and apparatus for preventing recognition of a telephone dialing signal
07/17/1991EP0437380A2 Cordless telephone
07/17/1991EP0437256A2 Automatic number identification blocking system
07/17/1991EP0437199A2 Communication terminal including memory
07/17/1991EP0436808A2 Summing amplifier with a complex weighting factor and interface with such a summing amplifier
07/17/1991CN2081178U Combined telephone arrangement for recording leaving messages
07/16/1991US5033109 Pocket transceiver
07/16/1991US5033094 Adjustable headset
07/16/1991US5033083 Telephone line switch apparatus
07/16/1991US5033081 Key telephone system
07/16/1991US5033078 Communication apparatus including facsimile and telephone functions
07/16/1991US5033076 Enhanced privacy feature for telephone systems
07/13/1991CA2033830A1 Communication terminal including memory
07/11/1991DE4100722A1 Changeover switch for telephone appts. - uses bistable relays associated with each telephone handset for selective connection to common telephone line
07/10/1991EP0436445A1 Electronic input interface for a telephone set
07/10/1991EP0436345A2 Voice and image communicating apparatus
07/10/1991EP0435967A1 Device for transmitting information
07/10/1991EP0435964A1 Energy saving protocol for a communication system
07/10/1991CN2080733U Automatic telephone disinfecting device
07/09/1991US5031212 Dialer circuit
07/09/1991US5031210 Telephone apparatus
07/09/1991US5031207 Method of establishing a data link between a pair of terminals as well as a terminal which is suitable for implementing this method
07/09/1991US5031205 Auto response phone system
07/09/1991CA1285993C Radio telephone apparatus
07/03/1991EP0435775A2 Cordless telephone
07/03/1991EP0435664A2 Radio communication apparatus for a selected one of a plurality of terminal units of different kinds
07/03/1991EP0435614A2 Communicating apparatus capable of utilizing a portable device to designate its communicating mode
07/03/1991EP0434950A2 Simulation of a complex impedance and interface for same
07/03/1991CN2080270U Electronic message-leaving device
07/03/1991CN2080269U Compactible detect double voice multi-frequency/pulse telephone set
07/02/1991US5029298 Transmitter circuit
07/02/1991US5029233 Radio arrangement having two radios sharing circuitry
07/02/1991US5029205 Lighted telephone
07/02/1991US5029203 Side tone preventive circuit for telephone
07/02/1991US5029202 Incoming telephone call director
07/02/1991US5029198 Telephone call responding system and control method and device therefor
07/02/1991US5029197 Automatic dialing and responding device
07/02/1991US5028083 Latch assembly
07/02/1991CA1285670C Control system for a plurality of telephone sets
06/1991
06/27/1991WO1991007715A3 Data entry book with sheet identification
06/27/1991DE3942758A1 Complex impedance two-to-four wire interface circuit - uses amplified with complex impedance feedback and series resistors to measure current and phase
06/27/1991DE3942428A1 Supplementary appts. with infrared link for cordless telephone - cooperates with handset to which photodiode and solar battery for demodulator and amplifying stages are added
06/26/1991EP0434435A2 Microphone-controller with multifunction single conductor
06/26/1991EP0434351A2 Facsimile terminal equipment
06/26/1991EP0434231A2 Paging accessory for portable computing devices
06/26/1991EP0434193A1 Jack assembly
06/26/1991EP0434071A2 Apparatus for driving a service function unit of a multi-function telephone set
06/26/1991EP0433308A1 Two-way radio communications system having selectable operating modes.
06/25/1991US5027428 Power saving arrangement and power saving method
06/25/1991US5027394 Folding type telephone containing a wound electrical connection
06/25/1991US5027392 Speaker drive arrangement for loudspeaker telephone
06/25/1991US5027391 Call management system
06/25/1991US5027389 Self-compensated dual tone multiple frequency generator
06/25/1991US5027385 Facsimile apparatus for communicating on external and internal telephone sets
06/25/1991US5027341 Station line switching control system
06/23/1991CA2032725A1 Adaptor set substitute for cord connecting telephone to telephone wall jack
06/21/1991WO1991009485A1 Microphone-controller with multifunction, single conductor
06/20/1991DE4039680A1 Remotely controlled facsimile transceiver - receives requests via telephone line for list of remote-control commands which it sends to remote transceiver
06/20/1991CA2029630A1 Jack assembly
06/19/1991EP0433166A2 Cordless telephone
06/19/1991EP0432746A2 Telecommunications terminal
06/19/1991EP0432547A2 Damping device for lids or flaps of a subscriber set
06/19/1991CN2079391U Telephone line checking wire guiding rod
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