Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › H04B 5 - Near-field transmission systems, e.g. inductive loop type
Patents for H04B 5 - Near-field transmission systems, e.g. inductive loop type (17,859)
11/1980
11/12/1980EP0018921A1 Device for electric transmission by a system of separable and contactless connections
10/1980
10/21/1980CA1088202A1 Radio communication system for confined environments
09/1980
09/30/1980US4225851 Self-calibrated subcarrier telemetry system
09/17/1980EP0015754A1 Audio transmission system
06/1980
06/11/1980EP0011810A1 System for remote recognition of a mobile body carrying a coded transponder unit
05/1980
05/13/1980US4203010 Communication system
05/13/1980CA1077584A1 Magnetically coupled coils with intervening conductive ring
01/1980
01/09/1980EP0006691A1 Object identification system
01/09/1980EP0006194A1 Circuit arrangement for the ungrounded transmission of signals across points of isolation in communication systems
01/09/1980EP0006182A1 Circuit arrangement for the ungrounded transmission of signals across points of isolation in telecommunication installations
11/1979
11/20/1979CA1066777A1 Telecommunication system
10/1979
10/30/1979CA1065435A1 Contact-free signal transmission
10/09/1979US4170757 Method of and apparatus for transmitting clandestine radio signals
09/1979
09/19/1979EP0004003A2 Information transmission system
09/18/1979US4168496 Quasi-stationary noise cancellation system
08/1979
08/28/1979CA1061411A1 Method of transmitting signals from a drill bit to the surface
07/1979
07/03/1979US4160209 Resonant circuit excitation method and apparatus
05/1979
05/15/1979CA1054694A1 Circuit arrangement for the ungrounded transmission of signals through testing points in communication systems
05/01/1979US4152648 Radiocommunication system for confined spaces
04/1979
04/24/1979US4151405 Ferromagnetic marker pairs for detecting objects having marker secured thereto, and method and system for activating, deactivating and using same
04/17/1979US4150358 Temperature measuring system for rotating machines
04/03/1979US4147973 Frequency dependent amplitude modulated translator apparatus
03/1979
03/13/1979CA1050616A1 Inductive carrier communication systems
01/1979
01/23/1979US4136338 Perimeter alarm apparatus
11/1978
11/14/1978CA1042513A1 Telecommunication systems including a base and mobile stations, repeaters and a transmission line
10/1978
10/17/1978CA1040724A1 Condition detecting and transmitting system
09/1978
09/26/1978US4117271 Inductive communication system
08/1978
08/29/1978US4110743 Wireless paging receiver
08/22/1978CA1037123A1 Telecommunication system using transmission lines and repeaters
08/15/1978US4107517 Opto-electric device
07/1978
07/04/1978US4099022 System for pulse data transmission through water-return cables
05/1978
05/23/1978US4091373 Selective calling receiver
05/09/1978US4088971 Flat high frequency cable useable with vehicle transmitter-receiver
05/02/1978US4087774 Information transmitting system
04/1978
04/04/1978US4083008 Method and circuit for generation of digitally frequency-shiftable electric signals
04/04/1978US4083006 Loop type standard magnetic field generator
01/1978
01/31/1978US4071714 Signal transmission system
12/1977
12/06/1977US4061972 Short range induction field communication system
10/1977
10/11/1977US4053835 Apparatus for transmitting high frequency signals
09/1977
09/20/1977US4048729 Electrical teaching system
06/1977
06/21/1977US4031480 Circuit arrangement for the ungrounded transmission of signals through testing points in communication systems
05/1977
05/03/1977US4021737 System for processing and transmitting audio signals received from a television set for reproduction by a high fidelity FM receiver
03/1977
03/15/1977US4012662 Communication system between a transmitter, receiver station and a mobile station utilizing unidirectional amplifiers between parallel radiated transmission lines
03/08/1977US4011551 Multiple data channel wireless data coupling system for transmitting measured data from a plurality of rotating sources
02/1977
02/01/1977US4006315 Inductive-carrier communication systems
12/1976
12/07/1976US3996554 Data transmission system
12/07/1976US3996518 Inductive carrier communication systems
11/1976
11/09/1976US3990377 Self-propelled machine for sea-bed work
10/1976
10/12/1976US3985977 Receiver system for receiving audio electrical signals
09/1976
09/07/1976US3979674 Radiating telecommunication systems
09/07/1976US3979673 Radiating telecommunication systems switching
08/1976
08/17/1976US3975700 Radio-frequency signaling cable for inductive-carrier communications systems
08/03/1976US3973200 Process for acknowledging calls in a system for wireless staff locators
07/1976
07/06/1976US3968435 Communication system
06/1976
06/29/1976US3967201 Wireless subterranean signaling method
06/15/1976USRE28867 Moving object communication control system
06/15/1976US3963999 Ultra-high-frequency leaky coaxial cable
03/1976
03/30/1976US3947832 System for protecting persons underground from dangerous areas
01/1976
01/20/1976US3934202 Tour guide system including means for noise and crosstalk suppression
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