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)
09/1990
09/20/1990DE3908706A1 Pause control in telephone stations with a telephone number memory
09/20/1990DE3908705A1 Dialling pause control in telephone stations with route selection
09/20/1990DE3907343A1 Line-powered, automatic changeover circuit which connects a main or secondary connection line to the terminals, in particular telephone stations
09/19/1990EP0388034A2 Telephone systems
09/19/1990EP0387953A1 Device for connecting a subscriber line to a selected internal line
09/19/1990EP0387338A1 Method and apparatus for controlling transmission of voice and data signals
09/19/1990CN2062530U Telephone adapter on tape recorder
09/18/1990US4958370 Control system for a plurality of telephone sets
09/18/1990US4958366 Telephone answering method and device providing outgoing message in a selected language
09/18/1990US4958153 Method and apparatus for priority control of incoming calls at ISDN terminals
09/14/1990CA2011150A1 Telephone systems
09/13/1990DE3907265A1 Answering machine
09/13/1990DE3907247A1 Communications equipment
09/13/1990DE3907237A1 Device for the simulation, analysis and monitoring of ISDN terminals operating according to the ISDN system
09/13/1990DE3907230A1 Electrical indication device with LCD indication for telecommunication installations
09/12/1990EP0387046A2 Communication system employing prepaid card
09/12/1990EP0386877A1 Telecommunications system
09/12/1990CN2062138U Dual-channel automatic dial device for sound couple wireless telephone
09/12/1990CN1009610B Home unit for wireless digital telephone system
09/07/1990WO1990010362A1 Telephone earpiece cushion
09/07/1990WO1990010361A1 Headset
09/07/1990WO1990008439A3 A speech processing apparatus and method therefor
09/05/1990EP0385782A2 Time dependent, variable amplitude threshold output circuit for frequency variant and frequency invariant signal discrimination
09/05/1990EP0385483A2 Telephone communication apparatus and method
09/04/1990WO1990010348A1 Telephone support device
09/04/1990US4955055 Loudspeaking telephone with a frequency shifting circuit
09/04/1990US4954672 Ground start key switch
09/04/1990US4953809 Microphone retrieval device
09/04/1990CA2050904A1 Telephone head support
09/04/1990CA1273722A1 Armored cord handset
08/1990
08/29/1990EP0384894A1 Subscriber telephone arrangement
08/28/1990US4953207 Electronic telephone set
08/28/1990US4953205 Flickering device for telephone sets
08/28/1990US4953202 Telephone line access control
08/28/1990US4953201 Additional telephone equipment and method for protecting against nuisance calls
08/28/1990US4953198 Public cordless telephone
08/24/1990WO1990010347A1 Cordless loudspeaker telephone
08/23/1990WO1990009726A1 Cordless headset telephone
08/23/1990DE3905257A1 Method for setting up connections in communications switching systems, in particular telephone switching systems
08/23/1990DE3905153A1 Telephone station
08/23/1990DE3905152A1 Connecting block for the hook switch of a telephone station
08/23/1990DE3905086A1 Changeover switching device for a telephone device for the connection of two telephone stations to a common telephone line
08/22/1990EP0383630A1 Radio communication system and its control method
08/22/1990EP0383447A1 Telecommunications system
08/22/1990EP0383277A2 Operating system of a mobile radio telephone
08/22/1990EP0382837A1 Transient signal eliminating circuit for telecommunications applications
08/21/1990USRE33309 Telephone handset amplifier circuit
08/21/1990US4951311 Telephone call indicator
08/21/1990US4951307 Method and apparatus for recording telephone messages
08/21/1990US4951043 Pager receiver helpful for effective use of call numbers
08/21/1990US4951039 Animated data display interleaving
08/21/1990US4951002 Battery powered in-line amplifier
08/21/1990CA1273134A1 Telephone signal transmission device
08/17/1990WO1990009709A1 Two-way optical communications system
08/16/1990EP0382601A1 Terminal for sound and visual communication with improved adjustments
08/16/1990EP0382069A2 Method and circuit arrangement for adjusting the volume in a mobile telephone
08/14/1990US4949375 Automatic positive telephone disconnect system
08/14/1990US4949374 Speech recognition system with an accurate recognition function
08/14/1990US4949372 Remote actuated command circuit for seizing telephone lines
08/14/1990US4948291 Connecting panel for mechanically joining a number of communication components arranged side-by-side
08/14/1990US4947569 Dialing card for telephones
08/14/1990CA1272817A2 Subscriber unit for wireless digital telephone system
08/08/1990EP0381326A2 Telephone handset
08/08/1990EP0381243A2 Show case with a road map and a telephone set
08/08/1990EP0381214A2 Telephone having touch sensor for responding to a call
08/08/1990EP0380819A1 Circuit with controllable active and/or passive elements
08/08/1990EP0380786A2 Telephone register
08/08/1990CN1044564A Recording and sending out telephone set with real-time prompting function
08/08/1990CN1044559A Telecommunications system
08/08/1990CN1044558A Telecommunication system
08/08/1990CN1044557A Telecommunications system
08/07/1990US4947426 Telephone protection circuit
08/07/1990US4947424 Shutter mechanism for telephone directory
08/07/1990US4947423 Communication apparatus with facilities for changing to a pulse or dial mode
08/07/1990US4947422 Personalized telephone for automatic access to operator services
08/07/1990US4946401 Connecting block for telephone
08/07/1990US4946010 Telephone cord retraction device
08/02/1990DE3906859C1 Carphone
08/02/1990DE3902683A1 Telephone station
08/01/1990EP0380372A1 Telecommunications system
08/01/1990EP0380290A2 Voice communication link interface apparatus
08/01/1990EP0380191A2 Method and apparatus for altering the access format of telephone calls
08/01/1990EP0380189A2 Method and apparatus for performing an automated collect call
08/01/1990EP0380160A1 Method of automatically selecting a data connection as well as a telephone set suitable for this method
08/01/1990CN2060026U Telephone secret-keeping device for extension with call-notifying and switching
07/1990
07/31/1990US4945570 Method for terminating a telephone call by voice command
07/31/1990US4945561 Telephone hanger for hospital bed
07/31/1990US4945558 Telephone set
07/31/1990US4945557 Voice activated dialing apparatus
07/31/1990US4945556 Method of locking function of mobile telephone system
07/31/1990CA1272319A1 Intrinsically safe telephone
07/31/1990CA1272317A1 Subscriber unit for wireless digital telephone system
07/31/1990CA1272316B Subscriber unit for wireless digital telephone system
07/31/1990CA1272315A1 Cordless telephone
07/31/1990CA1272236A1 Push and rocker action switch
07/28/1990WO1990009073A1 Telecommunications system
07/28/1990WO1990009072A1 Telecommunications system
07/28/1990WO1990009071A1 Telecommunications system
07/28/1990CA2008373A1 Telephone handset
07/26/1990WO1990008447A1 Mobile communications equipment
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