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)
11/1982
11/09/1982CA1135349A1 Current sources
11/03/1982EP0063748A1 Circuit arrangement for the generation of control magnitudes from the loop current
11/03/1982EP0063672A1 Telephone music device
11/02/1982US4357711 Two way radio safety helmet
11/02/1982US4357500 Telephone handset cord anti-twist accessory
11/02/1982US4357496 Keypad logic interface circuit
11/02/1982US4357494 Impedance canceller circuit
10/1982
10/28/1982WO1982003733A1 Subscriber telephone set provided with protection devices against overvoltages
10/27/1982EP0063217A1 Electric cable storage device
10/26/1982US4356509 Microcomputer-controlled television/telephone system and method therefore
10/26/1982US4356351 Digital memory audio playback apparatus
10/26/1982CA1134495A1 Telephone handset transducer mounting
10/19/1982US4355329 Remote station
10/19/1982US4355212 Wall telephone cradle assembly
10/19/1982US4355210 Sub-miniature tone encoder with automatic number identification
10/19/1982CA1134083A1 Variable loop telephone transmission circuit
10/14/1982WO1982003517A1 Cordless telephone system
10/13/1982EP0062163A1 Microtelephone set to be carried by a safety helmet
10/12/1982US4354063 Telephone handset with illuminated magnifier
10/12/1982US4354060 Electronic telephone
10/12/1982CA1133642A1 Telephone hookswitch actuator and handset support assembly
10/12/1982CA1133603A1 Two-wire line alarm and monitor circuit for a telephone line
10/12/1982CA1133552A1 Cam actuated switching device
10/06/1982EP0061991A2 Connecting unit for telecommunication equipment
10/05/1982US4352959 Device for visual display of telephone operation symbols
10/05/1982US4352958 Electronically-switched multifrequency generator with transducer control
09/1982
09/30/1982WO1982003160A1 Device for communicating between users of a vehicle
09/28/1982US4351987 Telephone line circuit hold arrangement
09/28/1982US4351986 Electronic telephones with cooperative interaction between a master set and members' sets in a group
09/28/1982CA1132461A1 Acoustic mounting and coupler for a telephone handset
09/22/1982EP0060395A1 Door arrangement
09/21/1982US4350964 Impedance generator circuit
09/21/1982US4350846 Acoustic mounting and coupler for a telephone handset
09/21/1982CA1132276A1 Telephone device
09/21/1982CA1132235A1 Selectively controlled digital pad
09/14/1982US4349706 Wall mounting adaptor for telephone set
09/14/1982US4349705 Lighted telephone dial
09/14/1982US4349704 Digital multifrequency signal generator
09/14/1982US4349701 Television receiver with two-way telephone conversation and dial-out capabilities
09/14/1982CA1131773A1 Apparatus for selectively operating multiple tape
09/08/1982EP0059469A1 System for forwarding along a telephone connection the identities of the subscribers involved in that connection
09/08/1982EP0059331A1 Hook-switch for telecommunication apparatuses, especially for telephone apparatuses
09/07/1982US4348555 Telephone with long distance dialing lock out
09/07/1982US4348550 Spoken word controlled automatic dialer
09/07/1982CA1131332A1 Communication system tracking arrangement
09/07/1982CA1131315A1 Infrared radiation communication system
09/02/1982WO1982002989A1 Hook switch for a telephone instrument of single body type
09/01/1982EP0059105A1 A message holder and clip therefor
08/1982
08/31/1982US4347407 Electronic telephone circuit
08/24/1982US4346265 Annunciator
08/24/1982US4346264 Telephone call restriction apparatus
08/24/1982US4346261 Speaker phones
08/18/1982EP0058130A2 Method for speech synthesizing with unlimited vocabulary, and arrangement for realizing the same
08/18/1982EP0057854A2 Automatic telephone answering machine
08/17/1982US4345114 Method and apparatus for recording and reproducing a message with an indication of a time occurrence
08/17/1982US4345113 Automatic telephone message interception system
08/17/1982CA1130028A1 Telephone with built in answering device
08/11/1982EP0057658A1 Compact telephone apparatus
08/03/1982US4342883 Pushbutton switch assemblies for telephone sets
08/03/1982US4342882 Automatic pause generator for dialers
07/1982
07/27/1982US4341991 Voltage stabilizer suitable for a telephone set
07/27/1982US4341929 Memory accessing system
07/27/1982US4341926 Apparatus for the direct connection of ancillary equipment to the telephone network
07/22/1982WO1982002463A1 Circuit for detecting loss of supply voltage
07/20/1982US4340784 Portable telephone answering device
07/20/1982US4340783 Voice frequency response system
07/20/1982CA1128225A1 Anti-vandalism arrangement for protecting the touch calling unit of a coin telephone
07/20/1982CA1128222A1 Lineman's hand test set
07/13/1982US4339632 Button illumination for repertory dialer with low battery voltage indication
07/08/1982WO1982002307A1 On-hook/off-hook detector circuit
07/08/1982WO1982002306A1 Radiotelephone with hands-free operation
07/08/1982WO1982002305A1 Support for a telephon receiver
07/07/1982EP0055650A1 Circuit for connecting an active microphone, in particular with an electret, to a telephone transmission circuit
07/07/1982EP0055259A1 Tone generator circuit
07/06/1982US4338492 Television receiver with two-way telephone conversation capability
07/06/1982CA1127337A1 Telephone handset with integral shoulder rest
07/06/1982CA1127336A1 Phone guard for locking out long-distance calls
06/1982
06/30/1982EP0054902A2 Method and apparatus for answering telephone calls automatically
06/29/1982US4337381 Clip-on electric lock and switching device for telephone
06/29/1982CA1126840A1 Data storage and retrieval structure for a message storage system
06/23/1982EP0054240A2 Electric apparatus for mounting in the open air, especially a telephone set for two-way, duplex or loudspeaker equipment
06/23/1982EP0054187A2 Multiple digital processor system
06/22/1982US4336422 Toll restrictor
06/15/1982US4335281 Post-auricle contoured headset for two-way voice communication
06/15/1982US4335280 Telephone construction
06/15/1982US4335279 Mechanical telephone conversation time limiting device
06/15/1982US4335278 Combined tape recording and playback apparatus and telephone answering apparatus controlled by pre-recorded signals
06/15/1982CA1125938A2 Telephone toll restrictor
06/15/1982CA1125937A2 Telephone toll restrictor
06/01/1982US4332984 Active speech network circuit for a telephone set
06/01/1982US4332983 Telephone privacy controller
06/01/1982US4332982 Telephone toll call security and logging device and method
06/01/1982US4332981 Cordless telephone
06/01/1982US4332362 Telephone note clip
06/01/1982CA1124907A1 Connection arrangement in a telephone instrument for connecting an additional speech device
06/01/1982CA1124906A1 Discriminating means for telephone circuits
05/1982
05/26/1982EP0052347A1 Telephone apparatus provided with a preamplifier with carrier current, an interrupter for disconnection of the microphone and a device for signalling this disconnection
05/25/1982CA1124351A1 Connector
05/19/1982EP0051726A1 Subscriber set arrangement
05/18/1982US4330869 System of optical telephony
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