| Patents for H04M 1 - Substation equipment, e.g. for use by subscribers (168,223) |
|---|
| 09/18/1984 | US4472697 Armature assembly for machine tool relay |
| 09/18/1984 | US4472607 Inflight headset for civil aircraft |
| 09/18/1984 | US4472606 Mobile radio-telephone handset and holder |
| 09/18/1984 | US4472601 Control circuit for telephone receiver and transmitter |
| 09/18/1984 | US4472599 Control circuitry for a tape cassette telephone answering device |
| 09/11/1984 | US4471493 Wireless telephone extension unit with self-contained dipole antenna |
| 09/11/1984 | US4471174 Support for helmets in general provided with microtelephone |
| 09/11/1984 | US4471170 Non-integer programmable counter |
| 09/11/1984 | US4471168 Wireless telephone extension unit with combination filter/oscillator unit |
| 09/11/1984 | US4471167 Wireless extension telephone |
| 09/11/1984 | US4471166 Wireless telephone extension unit with high level dial pulse signalling |
| 09/04/1984 | US4469919 Telephone answering device |
| 09/04/1984 | US4469918 Wireless telephone system with high level dial pulse signalling |
| 09/04/1984 | US4469915 Beeper simulator for a telephone answering apparatus |
| 09/04/1984 | CA1173981A1 Telephone alarm system |
| 09/04/1984 | CA1173943A1 Semiconductor crosspoint linearizing arrangement |
| 09/04/1984 | CA1173910A1 Radiotelephone with hands-free operation |
| 08/30/1984 | WO1984003408A1 Method and circuitry for encoding telephone ringing signals |
| 08/30/1984 | WO1984003407A1 Speakerphone control circuit |
| 08/30/1984 | WO1984003406A1 Non-integer programmable counter |
| 08/30/1984 | WO1984003405A1 Electronic tone ringer |
| 08/29/1984 | EP0116625A1 Multiple simultaneous tone decoder. |
| 08/28/1984 | US4468541 Terminal equipment ring/ding suppression circuit |
| 08/28/1984 | US4468540 Wireless telephone system with combination filter/oscillator circuit |
| 08/28/1984 | US4468539 Wireless telephone system with intercom signalling and auxiliary station |
| 08/28/1984 | US4468538 Wireless telephone system with high level dial pulse signalling |
| 08/28/1984 | US4468529 Programmable automatic calling systems |
| 08/21/1984 | USRE31649 Combined telephone index and keyboard for dialer |
| 08/21/1984 | US4467141 Telecommunication system with radio line |
| 08/21/1984 | US4467140 Microprocessor-based cordless telephone system |
| 08/21/1984 | CA1173183A1 Interface circuit with flux cancelling transformer circuit |
| 08/21/1984 | CA1173181A1 Circuit arrangement for establishing and terminating a data connection |
| 08/14/1984 | US4466120 Telephone handset amplifier circuit |
| 08/14/1984 | US4465907 Headset receiver and sanitizing storage system therefor |
| 08/14/1984 | US4465903 Electronic telephone interface circuit |
| 08/08/1984 | EP0115362A1 Arrangement for telephone communication by means of radio-electric signals |
| 08/08/1984 | EP0115240A1 Telephone set with a bidirectional infrared link between handset and fixed module connected to a subscriber's line |
| 08/07/1984 | CA1172365A1 Method for the synthesis of speech with an unlimited vocabulary and a circuit arrangement for carrying out the method |
| 08/07/1984 | CA1172344A1 Input/output device arrangements for terminals |
| 08/01/1984 | EP0114558A1 Circuit for the suppression of a microphone signal in a telephone apparatus |
| 08/01/1984 | EP0114464A1 Coupler for modular wiring systems |
| 08/01/1984 | EP0114423A1 Process for the realisation of an indefinite interruption of renumbering and application to a semi-automatic renumbering arrangement |
| 08/01/1984 | EP0114319A2 Automatic gain control circuit |
| 07/31/1984 | US4463222 Noise canceling transmitter |
| 07/31/1984 | US4462142 Fasteners |
| 07/31/1984 | CA1171990A1 Wall telephone cradle assembly |
| 07/31/1984 | CA1171988A1 Button illumination for repertory dialer with low battery voltage indication |
| 07/31/1984 | CA1171985A1 Automatic telephonic user emergency message transmitting apparatus |
| 07/31/1984 | CA1171945A1 Voice recognizing telephone call denial system |
| 07/24/1984 | US4462113 Cordless transmitting and receiving apparatus |
| 07/24/1984 | US4461929 Amplifier for electronic and electro-mechanical transmitters |
| 07/24/1984 | CA1171567A1 Arrangement for the automatic control of the sound level of a telephone station |
| 07/24/1984 | CA1171565A1 Transformerless hybrid circuit |
| 07/24/1984 | CA1171295A1 Telephone lock |
| 07/17/1984 | US4460233 Telephone terminal assembly |
| 07/17/1984 | CA1171187A1 Hook switch for a telephone instrument of single body type |
| 07/11/1984 | EP0112967A1 Call interceptor |
| 07/10/1984 | US4459435 Telephone privacy apparatus |
| 07/10/1984 | CA1170798A1 Expandable communication terminal housing |
| 07/10/1984 | CA1170538A1 Wall telephone stand |
| 07/04/1984 | EP0112728A1 Subscriber telephone system |
| 07/04/1984 | EP0112678A1 A telecommunications system |
| 07/03/1984 | US4458111 Charging and discharging circuit |
| 07/03/1984 | CA1170383A1 Telephone for a physically handicapped person |
| 06/26/1984 | US4456925 Television/telephone system with automatic dialing |
| 06/26/1984 | US4456799 Switch construction for telephone instrument |
| 06/26/1984 | US4456794 Fastening arrangement for a handset case halves |
| 06/26/1984 | US4456793 Cordless telephone system |
| 06/26/1984 | CA1169986A1 Fastening arrangement to keep together the parts of a handset consisting of two case halves |
| 06/26/1984 | CA1169969A1 Dictation system and method |
| 06/21/1984 | WO1984002440A1 Automatic selection apparatus for telephone |
| 06/20/1984 | EP0110888A1 A cordless telephone system. |
| 06/19/1984 | US4455617 Multiple simultaneous tone decoder |
| 06/19/1984 | US4455454 Telephone transmission system on a road-vehicle |
| 06/12/1984 | US4454387 Handset hanger and switch |
| 06/12/1984 | US4454385 Latching relay hold release circuit for a telephone instrument |
| 06/05/1984 | US4453217 Directory lookup method and apparatus |
| 06/05/1984 | US4453062 Pushbutton switch and integral lamp for telephone dials |
| 06/05/1984 | US4453043 Telephone for a physically handicapped person |
| 06/05/1984 | US4453042 Telephone station signaling lock circuit |
| 06/05/1984 | US4453041 Method and apparatus for processing coded information received through a telephone line during the non-active intervals of a ringing period |
| 06/05/1984 | US4453040 Telephone feature assignment circuit |
| 06/05/1984 | US4453039 Arrangement for avoiding annoying sustained oscillations in a closed-loop system and loud-speaking telephone set employing this arrangement |
| 06/05/1984 | US4453038 Circuit arrangement for producing control means from line current |
| 06/05/1984 | US4453037 Loop length compensation circuit |
| 06/05/1984 | EP0097710A4 Telephonic alphanumeric data transmission system. |
| 06/05/1984 | CA1168779A1 Construction of a telephone instrument |
| 06/05/1984 | CA1168778A1 Selecting keyboard unit, particularly for telephone systems |
| 05/29/1984 | US4451713 Pushbutton lock |
| 05/29/1984 | US4451707 Ring detector and telephone line monitoring system for telephone answering instrument |
| 05/29/1984 | CA1168389A1 Analogue/digital telecommunications subscriber station |
| 05/22/1984 | US4450534 Multiprocessor with dedicated display |
| 05/22/1984 | US4450412 Balanced amplifier output stage |
| 05/22/1984 | US4450319 Infrared telephone extension control system |
| 05/22/1984 | CA1167988A1 Line powered transformerless loudspeaking telephone |
| 05/22/1984 | CA1167652A1 Evaporator plate for cube ice machine |
| 05/16/1984 | EP0108228A2 Telephone set with low energy consumption |
| 05/15/1984 | US4449236 Anti-side tone transmitter |
| 05/15/1984 | US4449218 Analog/digital telecommunication subscriber station |
| 05/15/1984 | US4449157 Surge protection for signal transmission systems |