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)
01/1990
01/02/1990US4891835 Method and device for recording and replaying audio communications
01/02/1990US4891834 Recording telephone system equipped with a remote control change-over switch
01/02/1990US4890361 Telephone cord straightener
12/1989
12/28/1989WO1989012945A1 Portable radiotelephone with control switch disabling
12/28/1989WO1989012937A1 Telephone answering apparatus for mobile telephone systems
12/27/1989EP0347937A2 Radio telecommunication apparatus capable of reducing a dissipation power
12/27/1989CN1038384A High-frequency high-intensity electromagnetic field signal anti-interference circuit of telephone set
12/27/1989CN1006272B Wideband high voltage amplifier for telephone exchange subscriber line interface utilizing low voltage control circuitry
12/27/1989CA1264082A1 Electrostatic discharge protector for an electret microphone
12/26/1989US4890199 Protecting hair and makeup while dressing
12/21/1989DE3820808A1 Method for reading in data in telephone stations
12/21/1989DE3820633A1 Radio network
12/20/1989EP0347164A2 Dialer semiconductor integrated circuit
12/20/1989EP0347155A2 Communication apparatus
12/20/1989EP0346639A2 Portable radiotelephone with control switch disabling
12/20/1989CN2049849U Same subscriber line telephones'separator with mutual call function
12/20/1989CN2049848U Digital programmable language transmission dialogue apparatus
12/20/1989CN2049847U Apparatus for displaying telephone number of calling subscriber
12/20/1989CN1038182A Computer and telephone apparatus with user friendly computer interface and enhanced integrity features
12/19/1989US4888796 Program material screening device
12/14/1989WO1989012368A1 Portable call generator
12/14/1989DE3900994C1 Arrangement in communications terminals for the handset support
12/14/1989DE3819681A1 Method for distinguishing between incoming and outgoing connection set-up in telephone stations
12/14/1989DE3819526A1 Controller for the tape drives of a telephone answering machine
12/13/1989EP0346243A2 Dial signal generator for generating dial pulse signal and dual tone multi-frequency signal
12/13/1989EP0345988A2 Connecting block construction
12/13/1989EP0345939A2 Reducing power cannel acquisition in a multichannel communication system
12/12/1989US4887295 Telephone instrument
12/12/1989US4887294 Telephone automatic redial system
12/12/1989US4887288 Self calibration arrangement for a voice switched speakerphone
12/12/1989CA1263900A1 Subscriber unit for wireless digital telephone system
12/07/1989DE3818507A1 Telephone set
12/06/1989EP0344988A2 Connection terminal structure of electronic equipment
12/05/1989US4885774 Bracket for armored cord
12/05/1989US4885773 Apparatus for mounting a unidirectional microphone in a hands-free telephone subset
12/05/1989US4885772 Apparatus for obtaining a high sound level and good sound reproduction from a loudspeaking telephone
12/05/1989US4885771 Information storage system
12/05/1989US4885768 Active dipole telephone line protection device
12/05/1989US4885765 Telephone system with stimulus operation or default operation
12/05/1989US4885764 Automatic answering telephone system using main and auxiliary recording mediums
12/05/1989US4885762 Telephone apparatus
12/05/1989US4885580 Multi-function key input device
11/1989
11/30/1989WO1989011765A1 Process for establishing a connection between a fixed and several mobile elements in a cordless telephone system
11/30/1989DE3817422A1 Telephone set
11/29/1989EP0343875A2 A telephone handset convertible into a headphone
11/29/1989EP0343570A1 Method for authenticating a point-to-point connection in a multi-user communication system
11/29/1989EP0343528A2 Mobile telephone terminal
11/29/1989EP0097710B1 Telephonic alphanumeric data transmission system
11/29/1989CN2048654U Common telephone set for inner and outer line
11/29/1989CN2048653U Health cover for telephone mouth piece
11/29/1989CN1005950B Volume control circuit for use in portable telephone or the like
11/28/1989US4883432 Modular jack yoke
11/28/1989CA1263485A1 Cellular telephone
11/28/1989CA1263461A1 Surface lining for feeding an electrical receiver at various positions on the surface
11/23/1989EP0343089A1 Telephone interface circuit
11/23/1989EP0342314A2 Anonymous interactive telephone system with expanded outward calling features
11/23/1989DE3815908A1 Method for preserving the anonymity of a calling subscriber in communications switching systems
11/23/1989DE3815841A1 Method for transmitting data, in particular telephone addresses
11/23/1989DE3541548C1 Line unit for telephone/data transmission
11/21/1989US4882766 Terminal station of a radio communication network capable of effectively using radio channels assigned to the network
11/21/1989US4882750 Programmable dialer system
11/21/1989US4882746 Cordless telephone system
11/21/1989US4882745 Cordless headset telephone
11/21/1989US4882681 Remote language translating device
11/21/1989CA1263197A1 Portable handsets telephone communication system
11/16/1989WO1989011195A1 Computer and telephone apparatus with user friendly computer interface and enhanced integrity features
11/16/1989WO1989011186A1 Intercom telephone
11/15/1989EP0341881A2 Multichannel radio communication system
11/15/1989EP0341816A1 Apparatus and method for testing a customer line
11/15/1989EP0116625B1 Multiple simultaneous tone decoder
11/15/1989CN2047866U Self-oscillation magneto telephone set
11/14/1989US4881260 Automatic telephone answering device with multiple outgoing messages and selecting means
11/14/1989US4881259 Answering machine with cordless telephone
11/14/1989US4881258 Portable type mobile radio telephone
11/14/1989US4881256 Adjustable head support for telephone handsets
11/14/1989US4881254 Hand-held pay telephone and holder
11/14/1989US4881240 AM equalizer circuit for digital systems
11/09/1989DE3913478A1 Bilduebertragungsvorrichtung mit automatischer telefonanrufbeantwortung Bilduebertragungsvorrichtung with automatic phone call answering
11/09/1989DE3814728A1 Cordless telephone system
11/09/1989DE3814636A1 Contact springs which are arranged in a battery compartment for the retention of batteries
11/08/1989EP0341219A2 An integrated automatic information and telephone point
11/08/1989EP0340516A1 Speakerphone using digitally compressed audio to detect acoustic feedback
11/08/1989EP0340486A1 Mechanical assembly for electrical security in a telephone set or terminal
11/07/1989US4879746 Voice communication link interface apparatus
11/07/1989US4879745 Half-duplex speakerphone
11/07/1989US4879744 Card-operated telephone
11/07/1989US4879739 Wiring test device and method
11/07/1989CA1262756A1 Control system of a radio telephone apparatus
11/07/1989CA1262755A1 Radio telephone system control apparatus and method
11/02/1989WO1989010659A1 Detachable battery pack with a built-in broadband antenna
11/02/1989WO1989010610A1 Animated data display interleaving
11/02/1989WO1989007326A3 Telephone junction box and switch therefor
11/02/1989EP0339628A2 Detachable battery pack with a built-in broadband antenna
11/02/1989EP0339212A2 Optical hookswitch assembly for a telephone
11/02/1989DE3907895A1 Directional microphone
11/01/1989CN2047082U Telephone with automatic messenger call apparatus
10/1989
10/31/1989US4878243 Call forwarding system and method
10/31/1989US4878239 Anonymous interactive telephone system with expanded outward calling features
10/31/1989US4878238 Cordless telephone network
10/31/1989US4878237 Shoulder cradle for supporting a cellular car phone
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