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)
05/1989
05/11/1989DE3740026A1 Zusatzeinrichtung zu einem an einer telefonleitung angeschlossenen telefon Accessory to a phone connected to a phone line
05/11/1989DE3736900A1 Method for producing a piezoelectric transducer element for electroacoustic transducers
05/11/1989DE3736895A1 Handset for telecommunication devices
05/10/1989CN2037516U Electret microphone of magneto-telephone set
05/10/1989CN2037514U Extension telephone set
05/10/1989CN2037513U Subscribers line
05/09/1989US4829565 Telephone with background volume control
05/09/1989US4829561 Apparatus for optically coupling a terminal unit to the public telephone network through a pay telephone instrument and the like
05/09/1989US4829559 Facsimile apparatus with a mode for receiving non-image information
05/09/1989US4829557 Telephone answering device having outgoing message pause timer function
05/09/1989US4829556 Telephone answering device having telephone answering and conversation recording modes of operation
05/09/1989US4829555 TAD incorporated with VCR
05/09/1989CA1253939A1 Graphics based call management
05/05/1989WO1989004093A1 Passive universal communicator
05/05/1989WO1989004035A1 Method for entering digit sequences by voice command
05/03/1989EP0314655A2 Recording telephone system equipped with a remote control change-over switch
05/03/1989EP0314375A2 Telecommunications wiring test apparatus and method
05/03/1989EP0313562A1 Telephone on-hold device.
05/03/1989CN1032722A Announcement storage system for telephone answering machines
05/02/1989US4827518 Speaker verification system using integrated circuit cards
05/02/1989US4827506 Telephone receiver adaptor
05/02/1989US4827501 Telephone call screening apparatus
05/02/1989US4827498 Telephone line and instrument tester
05/02/1989CA1253625A1 Personal computer note-taking facility
04/1989
04/26/1989EP0313256A2 Telephone set
04/25/1989US4825466 Telephone interface security device
04/25/1989US4825465 Exclusionary device for coupling plural telephonic devices to a single central office trunk
04/25/1989US4825464 Successive key operating mechanism for telephone dialing
04/25/1989US4825463 Automatic dialer for accessing public network directly of via local network
04/25/1989US4825458 Subscriber telephone equipment test apparatus
04/25/1989US4825448 Subscriber unit for wireless digital telephone system
04/25/1989US4825130 Dispatch board system
04/20/1989WO1989003624A1 Radio arrangement having two radios sharing circuitry
04/20/1989DE3733717A1 Circuit for programming a telephony system or a telecommunication terminal
04/19/1989EP0311808A2 Method and circuit for noise compensation in microphones
04/18/1989US4823384 Telephone apparatus for the hearing impaired
04/18/1989US4823380 Voice changer
04/18/1989CA1252858A1 Security arrangement for cordless telephone system
04/13/1989DE3733415A1 Communication device
04/12/1989EP0311416A2 Translating communication system having central translating apparatus
04/12/1989EP0311414A2 Voice controlled dialer having memories for full-digit dialing for any users and abbreviated dialing for authorized users
04/12/1989EP0310889A2 Display device comprising a plurality of light sources
04/12/1989EP0310876A2 Radio arrangement having two radios sharing circuitry
04/12/1989CN2035944U Telephone index apparatus
04/12/1989CN1032415A Electronic talking equipment with carbon telephone transmitter
04/11/1989US4821320 Device for protecting electrical apparatus and the operator when the operator carries a high electrostatic charge
04/11/1989US4821319 Single line telephone communication system
04/11/1989US4821318 Convertible handset device for telephone sets
04/11/1989US4821317 Elastic telephone handset support
04/11/1989US4821311 Automatic telephone answering/recording device of digital type
04/11/1989US4821308 Telephone answering system with paging function
04/11/1989US4820192 Connecting block construction
04/11/1989CA1252584A1 Line switching circuit for cordless telephone
04/11/1989CA1252504A1 Integrated executive desk unit
04/06/1989WO1989003139A1 Method for terminating a telephone call by voice command
04/05/1989EP0310512A1 Protection device for a telephone line with an active dipole
04/05/1989EP0310475A2 Device to control the contents and the display duration of advertising messages
04/05/1989EP0310433A2 Radio telephone device
04/05/1989EP0310318A2 Radio telephone apparatus
04/05/1989EP0310284A2 Automobile telephone device
04/05/1989EP0310098A2 Communication system having telephonic function
04/05/1989CN1032274A Secondary dialling method within acoustic frequency band
04/04/1989US4819266 Telephone device with means for changing the angle of inclination
04/04/1989US4819265 Disposable cover for telephone
04/04/1989US4819264 Telephone sanitation device
04/04/1989US4819261 Public telephone set
03/1989
03/30/1989DE3731308A1 Circuit arrangement for connecting a family telephone system to an automatic intercom box switch
03/29/1989EP0309341A1 Terminal for audiovisual communication, especially a video phone having a housing with a hinge joint
03/29/1989EP0309301A1 Remote control apparatus for a computer associated with a video screen
03/29/1989CN1032092A Speech circuit for telephone
03/28/1989US4817204 Optical communication apparatus and method for telephone supervisory and audio signals
03/28/1989US4817164 Electrostatic discharge protector for an electret microphone
03/28/1989US4817139 Adjustable telephone handset cradle
03/28/1989US4817138 Telephone having a handset and a rase each having a receiver and microphone
03/28/1989US4817136 Telephone dialing system
03/28/1989US4817135 CRT mass-distribution, preprogrammed automatic dialing mechanism and related processes
03/28/1989US4817133 Party selecting circuit arrangement
03/28/1989US4817128 Easily operable automatic telephone answering/recording apparatus and method of operating the same
03/28/1989US4817127 Modular dictation/transcription system
03/28/1989US4817089 Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
03/28/1989US4815980 Combined chassis retention and electrical contact arrangement
03/28/1989CA1251853A1 Telephone handset assembly
03/23/1989DE3730231A1 Device for a telephone set in the form of a panel
03/23/1989DE3729950A1 Membrane oscillator (diaphragm oscillator) having a piezoelectric drive
03/22/1989EP0308301A1 Telephone device with a radio connection
03/22/1989EP0308204A2 Car telephone equipment having automatic calling function
03/22/1989EP0308180A2 Radio communication apparatus
03/22/1989EP0307545A2 Digital radiotransmission method for a cordless telephone
03/21/1989US4815127 Communication system using unbalanced communication paths
03/21/1989US4815126 Telephone line switch
03/21/1989US4815125 Telephone dialing system
03/21/1989US4815122 Telephone answering system with means for recovering operational data
03/21/1989US4815121 Communication apparatus recognizing speech and automatically switching from data to speech transmission
03/21/1989CA1251585A1 Interphone system with security function
03/15/1989EP0307193A2 Telephone apparatus
03/15/1989EP0307137A2 Multiple language telephone answering machine
03/15/1989EP0306898A2 Assembly plate for the mechanical connection of several telecommunication appliances arranged side by side
03/15/1989EP0306897A2 Switch for a telephone apparatus
03/15/1989EP0306520A1 Telephone call monitoring, metering and selection device
03/15/1989EP0306483A1 Telephone protection circuit
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