| Patents for H04B 5 - Near-field transmission systems, e.g. inductive loop type (17,859) |
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| 01/09/1991 | EP0407226A2 Leaky feeder transmission system |
| 01/08/1991 | US4983963 Electromagnetic communication interface |
| 12/26/1990 | CN1011016B Communication system |
| 12/05/1990 | EP0335931A4 Shopping cart display system |
| 11/29/1990 | DE4005770A1 Coaxial cable aerial for communication system - has transmission aerial on transmission platform with several non-tight coaxial cable lengths |
| 11/27/1990 | US4973952 Shopping cart display system |
| 11/22/1990 | EP0398301A2 Data carrier apparatus and method of manufacturing the same |
| 11/22/1990 | EP0397755A1 Magnetic field concentrator |
| 11/20/1990 | US4972505 Tunnel distributed cable antenna system with signal top coupling approximately same radiated energy |
| 11/15/1990 | WO1990013953A1 Induction-based assistive listening system |
| 11/13/1990 | CA1276242C Wide band inductive transdermal power and data link |
| 11/07/1990 | CN1010366B Multifunctional full-digitized call selector |
| 10/24/1990 | EP0393089A1 Transponder. |
| 10/24/1990 | CN1010165B Multiple purpose signal system for building |
| 10/18/1990 | WO1990012474A1 Vehicle tire identification system |
| 10/18/1990 | WO1990012463A1 Spread spectrum-time diversity communications systems and transceivers for multidrop local area networks |
| 10/18/1990 | WO1990012276A1 A direct current position measuring device |
| 10/18/1990 | DE3912497A1 Gleichzeitige energie- und datenrueckuebertragung ueber lose transformatorische kupplung Simultaneous energy and datenrueckuebertragung about loose coupling transformer |
| 10/17/1990 | CN1010069B Dc to dc converter |
| 10/10/1990 | EP0390822A1 Identification apparatus and methods. |
| 10/10/1990 | CN2063726U Safety calling device for multi-storied building |
| 10/03/1990 | EP0390008A2 Device for testing and/or measuring a test object |
| 09/28/1990 | CA2013144A1 Inductive signal transmission |
| 09/18/1990 | CA1274279A1 Portable communications system |
| 09/12/1990 | EP0386134A1 Antenna system for magnetic and resonant circuit detection. |
| 09/11/1990 | US4956645 Radio system for data transmission with one passive end and station included in such a system |
| 09/05/1990 | EP0385790A2 Vehicle with a door controlled via an electromagnetic communication interface |
| 09/05/1990 | EP0385672A2 Induction coil driver |
| 09/01/1990 | CA2008442A1 Induction coil driver |
| 08/14/1990 | CA1272762A1 Bidirectional system for transmitting informations between a ground control station and a mobile station |
| 08/08/1990 | CN2060271U 医院通讯呼叫系统 Call the hospital communication system |
| 08/01/1990 | EP0380426A1 Resonant tag and method of manufacturing the same |
| 08/01/1990 | EP0379902A1 Inductively coupled data-processing apparatus |
| 08/01/1990 | EP0379901A1 Data-processing apparatus |
| 07/31/1990 | US4945305 Device for quantitatively measuring the relative position and orientation of two bodies in the presence of metals utilizing direct current magnetic fields |
| 07/31/1990 | US4944299 High speed digital telemetry system for implantable device |
| 07/25/1990 | EP0378546A1 Data carrying devices |
| 07/25/1990 | CN2059780U Intelligent call device for ward nursing |
| 07/24/1990 | US4943803 Paging system with paging receivers controlled depending on location |
| 07/11/1990 | EP0377257A1 Identification system |
| 07/10/1990 | US4941201 Electronic data storage and retrieval apparatus and method |
| 07/03/1990 | US4939400 Transmission apparatus having split-coil type coaxial coupler |
| 07/03/1990 | CA1271225A1 Selective call receiving apparatus having display |
| 06/27/1990 | CA2006622A1 Identification system |
| 06/20/1990 | EP0374018A1 Device for the remote exchange of information between a portable object and a station |
| 06/19/1990 | US4935738 Process for transmitting signals between two elements and device for carrying out said process |
| 06/13/1990 | EP0372461A1 Improved process and apparatus for transmitting measurements through a metal pipe |
| 06/13/1990 | DE3841464A1 Textile machine having assemblies for the maintenance and/or servicing of the work units |
| 06/13/1990 | CN1008406B Arrangement for wireless signal transmission from a rotating body to a stationary receiving station |
| 06/12/1990 | US4933921 Signal reproducing apparatus |
| 06/05/1990 | US4932006 Process for signal transmission without electric connection through a conducting wall, the hull of a ship for example, and a device for implementing same |
| 05/22/1990 | US4928087 Phase-stabilized, phase-coupled resonant circuit |
| 05/09/1990 | EP0366739A1 Electric transmission device |
| 05/08/1990 | US4924171 System for supplying power source by electromagnetic induction coupling |
| 05/01/1990 | US4922261 Aerial systems |
| 04/26/1990 | DE3840180C1 Housing with contact-free feed-through of radio-frequency signals |
| 04/17/1990 | US4918745 Multi-channel cochlear implant system |
| 04/10/1990 | US4916460 Distributed antenna system |
| 04/04/1990 | CN2055654U Delivering equipment for radio earphone |
| 04/03/1990 | US4914399 Induction coil driver |
| 03/27/1990 | US4912461 Apparatus and network for transferring packets of electronic signals and associated method |
| 03/20/1990 | US4910795 Wireless hand held microphone |
| 03/20/1990 | US4910793 Two-way transmission system for ground/mobile station communications |
| 03/13/1990 | US4908869 For addressing hearing-impaired persons within an audience |
| 03/07/1990 | EP0356741A1 Process and apparatus for transmitting measurements through a metal pipe |
| 02/28/1990 | EP0356090A2 Fibre optic data coupler |
| 02/28/1990 | EP0355338A1 Wide-band information and/or instruction transmitting device between a moving element in a plane and a control station |
| 02/27/1990 | US4905205 Method for transmitting to a central recording device seismic data collected by acquisition apparatus distributed over the ground and a device for implementing same |
| 02/21/1990 | CN2053412U Wireless telecontroller with multiple codes and strong anti-interference function |
| 02/06/1990 | US4899388 Infrared stereo speaker system |
| 01/30/1990 | US4897644 Radio-wave transmission system of keyless entry system for automotive vehicle devices |
| 01/23/1990 | CA1264811A1 Well data transmission system using a magnetic drill string for transmitting data as a magnetic flux signal |
| 12/28/1989 | WO1989012916A1 Antenna system for magnetic and resonant circuit detection |
| 12/27/1989 | EP0347893A2 Programmable memory for an encoding system |
| 12/27/1989 | CN2050243U Colour televesion remote controller |
| 12/07/1989 | DE3916610A1 Device for data transmission and track guidance of vehicles |
| 12/05/1989 | US4885797 Communication system |
| 11/29/1989 | CN2048652U Mini integrated wireless transmission device |
| 11/23/1989 | EP0343034A1 Radio system for data transmission with a passive terminal station |
| 11/23/1989 | DE3816135A1 Electronic coupling for robots and automatic handling machines |
| 11/14/1989 | US4881150 Housing and holder assembly for a portable communication apparatus |
| 11/07/1989 | US4879755 Medium frequency mine communication system |
| 11/02/1989 | WO1989010651A1 Electric transmission device |
| 10/19/1989 | WO1989010030A1 Actuator and communication system |
| 10/11/1989 | EP0335931A1 Shopping cart display system |
| 10/11/1989 | CN2045917U Three-wire calling unit for ward |
| 10/04/1989 | CN2045562U Wire remote controller for tv set |
| 09/27/1989 | EP0334804A2 Resonant circuit with stabilized phase coupling |
| 09/26/1989 | CA1261024A1 Arrangement for wireless signal transmission from a rotating body to a stationary receiving station |
| 09/19/1989 | US4868887 Cable-car with information transmission via the cable |
| 09/12/1989 | US4866732 Wireless telephone system |
| 09/12/1989 | US4866515 Passenger service and entertainment system for supplying frequency-multiplexed video, audio, and television game software signals to passenger seat terminals |
| 09/12/1989 | US4866455 Antenna system for magnetic and resonant circuit detection |
| 09/08/1989 | WO1989008295A1 Apparatus and network for transferring packets of electronic signals and associated method |
| 09/05/1989 | US4864633 Inductive device for the rapid exchange of data between two data carriers |
| 08/16/1989 | CN1034835A Medium frequency mine communication system |
| 08/10/1989 | WO1989007347A1 Magnetic field concentrator |
| 08/03/1989 | DE3908786A1 Method for data transfer between boards of an electronic circuit |
| 08/03/1989 | DE3804592C1 Remote read-out system for consumption meter (electricity meter, supply meter) |
| 08/02/1989 | CN1034461A Multifunctional full-digitized call selector |