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)
02/1992
02/19/1992CN2096850U Radio earphone
02/18/1992CA1296063C Medium frequency mine communication system
02/13/1992DE4023412A1 Inductive coupling for electrical energy of signals - uses bandpass filter with periodic short-circuiting of secondary oscillation circuit
02/05/1992EP0469506A1 Radio transmission apparatus using leaky cables
01/1992
01/28/1992US5084864 Broadband, inductively coupled, duplex, rf transmission system
01/28/1992CA1295020C Radio system for data transmission with one passive end
01/22/1992EP0466949A1 Device for contactless transfer of data and energy and its use
01/22/1992CN2094156U Remote transmission system for game machine
01/21/1992US5083013 System for remote information interchange between a portable object and a station
01/15/1992EP0418378A4 A direct current position measuring device
01/08/1992EP0465457A2 System for providing adaptive channel frequencies in a tunnel
01/08/1992EP0464180A1 Bidirectional inductive transmission of data with slave station supplied by the master.
01/02/1992EP0287645B1 Inductive coupled power system
01/02/1992DE4018814A1 Verfahren und system zum uebertragen von energie und daten Method and system for carrying over of energy and data
01/02/1992DE4017934A1 Wireless signal interrogator for relay station - achieves capacitive energy and data transmission using opposite electrode pairs forming capacitors at both stations
12/1991
12/27/1991WO1992000635A1 A data transmission equipment
12/27/1991CA2086114A1 Data transmission equipment
12/18/1991CN2091045U Drive transmitter
12/13/1991WO1991020135A1 Process and system for transmitting energy and data
12/13/1991CA2084995A1 Process and system for transmitting energy and data
12/11/1991CN2090594U Wireless type ear piece for tv
12/03/1991US5070500 Memory package system utilizing inductive coupling between memory module and read/write unit
11/1991
11/30/1991WO1991019361A1 Electric power and data signal transmission system
11/30/1991CA2083828A1 Electric power and data signal transmission system
11/21/1991EP0457690A1 Contactless connection device for connecting serial data bus sections
11/21/1991EP0457379A2 Broadband, inductively coupled, duplex, RF transmission system
11/21/1991EP0457306A2 Method and device to read and write a data memory driven by a microprocessor, especially for a measuring or counting recording device
11/19/1991CA2042837A1 Contactless linking device for interconnection data bus sections
10/1991
10/30/1991CN2087845U Head-set radiotelephone intercommunication set
10/23/1991EP0281564B1 Communication system
10/17/1991DE4112064A1 Contactless inductive energy transfer system
10/16/1991EP0451445A2 Contactless inductive transmission method of electrical energy and/or signals and contactless inductive transmission device
10/16/1991CN2086950U Vehicular talkback set
10/15/1991US5057797 System for transmitting broadband data and/or instructions between an element moving in one plane and a control station
10/15/1991CA1290841C Electromagnetic identification system
10/09/1991CN2086481U Communication tourist guide device
10/01/1991US5054112 Electronic data collection system
10/01/1991US5053768 Golf cart control system
09/1991
09/26/1991DE4021920C1 Transmitting information for railway signalling - using antenna in-front of first axle of locomotive and rails forming sec. coil
09/25/1991CN2085582U Household electronic jingle bell with intercom
09/25/1991CN1054867A Transmission device for letter box
09/22/1991WO1991015068A1 Communication system using spread spectrum and leaky transmission line
09/21/1991WO1991015918A1 Full-duplex, sub-band spread spectrum communications system
09/18/1991EP0447278A2 Installation for remote control of price displays in a shop
09/11/1991EP0393089A4 Transponder
09/11/1991EP0390822A4 Identification apparatus and methods
09/10/1991CA2037830A1 Microwave communications installation
09/05/1991WO1991013499A1 A receiver and transmitter arrangement intended preferably for an electronic price information system
09/03/1991CA1288495C Aircraft service system
08/1991
08/28/1991EP0443536A2 Capacitive data transfer device
08/28/1991CN2083810U Radio/ remote alarm device
08/21/1991EP0442259A1 Regenerative RF bi-directional amplifier system
08/21/1991CN1053982A Method and equipment for communication in underground channel
08/21/1991CN1053979A Information transmission system without mutual interference
08/20/1991US5042084 Three wire system for Cochlear implant processor
08/20/1991US5042054 Method for generating a data receiving clock of paging receiver
08/14/1991EP0441492A2 System and method for transferring data
08/07/1991CN2082489U Multifunctional remoted switch with stepless regulating voltage
08/06/1991CA1287373C Infrared stereo speaker system
07/1991
07/30/1991US5036308 Identification system
07/20/1991WO1991011063A1 Bidirectional inductive transmission of data with slave station supplied by the master
07/20/1991CA2047736A1 Bidirectional inductive transmission of data where the slave station is fed by the master station
07/11/1991WO1991010206A1 Transmission system
07/10/1991EP0409880A4 Actuator and communication system
07/03/1991EP0434817A1 Proximity detecting apparatus.
06/1991
06/22/1991WO1991009757A1 Golf cart control system
06/19/1991CN1012928B Medium frequency mine communication system
06/18/1991US5025452 Full-duplex, sub-band spread spectrum communications system
06/13/1991WO1991008539A1 An electronic price information system
05/1991
05/28/1991US5019730 Information separation device
05/21/1991US5018165 Communication system using spread spectrum and leaky transmission line
05/14/1991CA1284209C Transmission having one central seismic data recording device, for signalsemitted by a set of probes
05/08/1991DE3936547A1 Inductive communication between pace maker and equipment - has receiver coil coupled to compensation coil to eliminate effect of magnetic noise
05/02/1991WO1991006158A1 Recorded message delivery system
05/02/1991CA2070392A1 Recorded message delivery system
04/1991
04/24/1991CN2075836U Multifunctional answering electronic alarm
04/23/1991US5010575 Audio current pick-up device
04/17/1991CN2075405U Transmitter-receiver for miniature hi-fi sound signal
04/16/1991US5007697 Fibre optic data coupler
04/11/1991DE3932550A1 Individual data local transmission system e.g. for shopping trolleys - uses overhead transmitters communicating to mobile trolleys with display devices
04/02/1991US5005183 Wireless telephone system
03/1991
03/27/1991EP0418378A1 A direct current position measuring device.
03/26/1991CA1282010C Inductive coupled power system
03/21/1991WO1991003887A1 Three wire system for cochlear implant processor
03/20/1991EP0417267A1 Vehicle tire identification system.
03/20/1991CN1050115A Steplessly-regulated remote controller
03/14/1991DE3930598A1 Radio receiving station for eurosignal information - uses modular receivers selecting different frequencies examined by selection circuit for re-transmission in restricted area
03/13/1991CN2073197U Ultrasonic wave aural transmitter for tv-audio
03/08/1991CA2022237A1 Three wire system for cochlear implant processor
03/05/1991CA1281104C Guide wire communications system and method
02/1991
02/26/1991US4996716 Vehicle communication system using existing roadway loops
02/20/1991CN2071852U Call intercom for nursing in hospital
02/20/1991CN1049432A Transmission system
02/19/1991US4994784 Paging receiver
02/13/1991EP0412424A2 High speed digital telemetry system for implantable device
02/13/1991CN2071404U Monitor for radio
02/07/1991WO1991001531A1 Proximity detecting apparatus
02/05/1991US4991209 Random local message encryption
01/1991
01/30/1991EP0409880A1 Actuator and communication system.
01/15/1991US4985922 Signal and power transmission through a wall
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