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)
07/1989
07/12/1989CN1033896A Mine emergency communication cable and method for use
07/04/1989US4845751 Wireless stereo headphone
06/1989
06/15/1989WO1989005549A1 Identification apparatus and methods
06/14/1989EP0320015A2 Inductive data communicating apparatus
06/13/1989CA1255756A1 Methods of communicating over metallic conductors having multiple grounds
06/07/1989EP0319099A1 Paging system with paging receivers controlled depending on location
06/07/1989EP0191019B1 Unit for transferring binary data between a movable data medium and a fixed station
06/01/1989WO1989005067A1 Transponder
05/1989
05/30/1989US4835604 Aircraft service system with a central control system for attendant call lights and passenger reading lights
05/18/1989WO1989004568A1 Transceiver system for communication over wire laid along the path of guided vehicles
05/10/1989CN2037512U Earphone with eliminate noise
05/09/1989US4829500 Portable wireless sound reproduction system
05/09/1989US4829466 Paging device with modifiable operational characteristics
05/03/1989DE3735839A1 Arrangement for transmitting radio signals
04/1989
04/24/1989EP0287645A4 Inductive coupled power system.
03/1989
03/23/1989WO1989002628A1 Shopping cart display system
03/22/1989CN2034757U Ct transmitter synchronous acoustooptic calling device
03/14/1989CA1251275A1 Meter for passively logging the presence and identity of tv viewers
02/1989
02/23/1989WO1989001722A1 Device for transmitting data from an animal body
02/23/1989WO1988002171A3 Remote accessible memory devices
02/21/1989US4806906 Data terminal
02/16/1989EP0232383A4 Adapter for car radio.
02/16/1989DE3726484A1 Vorrichtung zur uebermittlung von daten aus einem tierkoerper Apparatus for about communication of data from a tierkoerper
02/15/1989CN2032780U Additional divice for remote control of color tv
02/09/1989WO1989001208A1 Data carrying devices
02/02/1989DE3724310A1 Device for inductive coupling of fixed-position receiving apparatuses and mobile transmitting apparatuses of vehicles travelling in lanes (tracked vehicles)
01/1989
01/31/1989CA1249635A1 Pager with display
01/24/1989US4800385 Well data transmission system using a magnetic drill string for transmitting data as a magnetic flux signal
01/18/1989CN2031182U Mutual-detector
01/11/1989EP0298759A2 Housing and holder assembly for a portable communication apparatus
01/03/1989US4796028 Apparatus for bidirectional data transmission
12/1988
12/21/1988EP0296092A2 Arrangement for wireless earphones without batteries and electronic circuits, applicable in audio-systems or audio-visual systems of all kinds
12/20/1988US4792965 For transmission of data across a gap without physical connection
12/20/1988CA1247266A1 Wireless telephone system
12/06/1988US4790001 Methods of communicating over metallic conductors having multiple grounds
12/06/1988US4789049 Signal transmitting equipment for elevator
12/06/1988CA1246178A1 Inductive coupling system for the bi-directional transmission of digital data
11/1988
11/30/1988EP0292950A2 Medium frequency mine communication system
11/09/1988EP0289830A2 Identification system comprising a plurality of devices to write, read and recognise a code, and a plurality of code carriers and method therefor
11/02/1988EP0288791A2 Wireless transmission method for power and data transmission, and mechanically and electronically coded lock
10/1988
10/26/1988EP0287645A1 Inductive coupled power system.
10/12/1988EP0061462B1 Multi-system portable paging device
10/11/1988US4777652 Radio communication systems for underground mines
10/05/1988EP0285477A1 Device for information transmission, particularly for coupled vehicles
10/05/1988EP0284809A1 Method for transmitting radio signals and transmission system for carrying out the method
09/1988
09/21/1988EP0282559A1 Remote accessible memory devices
09/14/1988EP0282183A1 Aircraft service systems and methods
09/14/1988CN87103456A Measuring method and device through obstacle
09/07/1988EP0281470A1 Inductive device for fast data exchange between two supports
08/1988
08/24/1988EP0279711A1 Method and device for signal transmission between two parts
08/09/1988US4763340 Capacitive coupling type data transmission circuit for portable electronic apparatus
08/03/1988EP0277014A2 Service and entertainment communication system
08/02/1988US4761101 Arrangement for wireless signal transmission from a rotating body to a stationary receiving station
07/1988
07/27/1988EP0275781A1 Method and apparatus for the transmission to a central recording apparatus of seismic data collected by acquisition devices spread on the ground
07/20/1988EP0274650A1 Bidirectionnel information transmission system between a monitor station on the ground and a mobile station
07/19/1988US4759078 Coordinated local oscillator receiving system
07/19/1988US4758836 Inductive coupling system for the bi-directional transmission of digital data
07/06/1988EP0273379A2 Well data transmission system using a magnetic drill string
06/1988
06/22/1988CN86108791A 通讯系统 Communication system
06/14/1988US4751734 Receiver for FM stereophonic broadcasting system utilizing circuits for reducing effects of multipath
06/14/1988US4751685 Cable driver for a telemetry transmitter used underwater
06/14/1988US4751516 Antenna system for magnetic and resonant circuit detection
06/07/1988US4749993 Arrangement for the wireless transmission of measuring signals
05/1988
05/24/1988US4747158 Cordless communications system
04/1988
04/21/1988WO1988002944A1 Inductive coupled power system
04/20/1988EP0263833A1 Magnetic transmission
04/06/1988CN87214458U Train detecting head
04/05/1988US4736452 Core coupled transmitter/receiver loops for connectorless entertainment systems
04/05/1988CA1234868A1 Dc to dc converter
03/1988
03/24/1988WO1988002171A2 Remote accessible memory devices
03/23/1988EP0260725A2 Core coupled transmitter/receiver loops for connectorless entertainment systems
03/15/1988US4731867 Vehicle communication system using existing roadway loops
02/1988
02/09/1988US4723737 Process and device for transmitting data between vehicles moving over a track
01/1988
01/27/1988EP0253877A1 Aerial systems.
01/13/1988EP0252184A1 Pit cover meter reader
01/12/1988CA1231389A1 Display pager having memory overflow indication and concurrent message display functions
12/1987
12/15/1987US4713659 Pager with display
12/08/1987US4712250 Tape player adapter for car radio
12/03/1987DE3617704A1 Method for transmitting data in drill pipes and arrangement for carrying out the method
11/1987
11/25/1987EP0246374A1 Proximity data transfer devices
11/11/1987EP0245196A2 Method for data transmission between a fixed part and a mobile part
11/10/1987US4706272 Paging communication system
11/10/1987US4705960 Control device including a conductively isolated depluggable controller
11/05/1987DE3615014A1 Device for transmitting data signals and/or speech signals between an aircraft-towing vehicle and the aircraft being towed
10/1987
10/28/1987EP0242906A1 Electromagnetic identification system
10/06/1987CA1227835A1 Paging communication system
09/1987
09/29/1987US4697183 Means for non-contacting signal and energy transmission
09/23/1987EP0238097A2 Multi-system paging device with power conservation
09/15/1987CA1226932A1 Signal transmission, without electrical links, through a conducting wall
09/08/1987CA1226624A1 Signal transmission system
08/1987
08/19/1987EP0232383A1 Adapter for car radio
08/13/1987WO1987004865A1 Aerial systems
08/13/1987WO1987003501A3 Communication system
08/12/1987EP0231866A2 Data terminal
08/04/1987US4685133 Wireless audio transmission system
07/1987
07/22/1987EP0229399A2 Arrangement for wireless signal transmission from a rotating body
07/22/1987EP0229133A1 Cable car with data transmission by cable
07/22/1987CN87100108A Arrangement for wireless signal transmission from a rotating body to a stationary receiving station
07/21/1987US4682148 Display pager having memory overflow indication and concurrent message display functions
07/21/1987US4681111 Analog and digital telemetry system for an implantable device
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