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)
08/1994
08/10/1994	EP0609964A2 Adjustable reactance device and method
08/10/1994	EP0603204A4 Improved electromagnetic hearing system.
08/10/1994	CN2174012Y All-band noise-proof wireless communicator
08/02/1994	CA1331220C Identification system having a plurality of devices for reading, writing and recognizing a code and a plurality of code carriers and associated process
07/1994
07/27/1994	CN2172932Y Speach paging system
07/27/1994	CN1090104A Same frequency selective calling device without central station
07/20/1994	EP0606211A1 Binary encoded multiple frequency rf identification tag
07/13/1994	CN1089413A Radio call receiving system with sound storing function
07/13/1994	CN1089411A Radio micro-calling device
07/12/1994	US5329274 Apparatus for contactless data and energy transmission and method for operating such an apparatus
07/06/1994	EP0578752A4 Inconspicuous communication method utilizing remote electromagnetic drive
07/06/1994	CN1089068A Communication and wireless paging technique with direct name call
06/1994
06/29/1994	EP0603204A1 Improved electromagnetic hearing system
06/29/1994	CN2170609Y Hydraulic pond sludge scooping machine set with remote-controller
06/22/1994	CN2169953Y Calling person instrument
06/09/1994	WO1994013070A1 Selective call signaling system and method with combined wide area paging and high data rate transmissions via radio telephone transceivers
06/09/1994	WO1994013067A1 Radio coverage in closed environments
06/09/1994	CA2128107A1 Radio coverage in closed environments
06/08/1994	EP0600695A2 Wireless communications using near field coupling
06/01/1994	CN2167484Y Transceiver for speaking near both sides of door
05/1994
05/31/1994	US5317330 Dual resonant antenna circuit for RF tags
05/25/1994	EP0598528A2 Identification system using magnetic coupling
05/25/1994	CN1087215A Pager and its control method
05/25/1994	CN1087171A Wireless remote signalling apparatus for X-ray flaw detector
05/18/1994	CN2165576Y Wireless frequency modulating transmitter-receiver
05/18/1994	CN1086920A Automatically identifying device for coke oven number
05/17/1994	US5313198 Data communication apparatus
05/11/1994	CN2164615Y High protectivity wireless remoting safety device
05/04/1994	CN2164159Y Two-way calling device
05/04/1994	CN2164158Y Two-way wire intercommunicating door bell
05/03/1994	US5308968 Non-contact IC card which actively attenuates its resonance circuit as it receives data
04/1994
04/20/1994	CN2162747Y Multifunction remote control device
04/13/1994	EP0592224A1 Dual resonant antenna circuit for RF tags
04/13/1994	CN2162045Y Language acoustooptical communication apparatus
04/13/1994	CN2161959Y Theft-proof alarm set for motocycle
04/12/1994	US5302954 Identification apparatus and methods
04/05/1994	US5301082 Current limiter circuit
03/1994
03/30/1994	EP0589608A2 Contactless communication system
03/29/1994	US5297917 Method of acting remotely in a mine shaft, in particular in a site for deep storage of nuclear wastes
03/15/1994	US5295064 Intelligent shopping cart system having cart position determining and service queue position securing capability
03/15/1994	CA2054198C Communications system using spread spectrum and leaky transmission line
03/08/1994	US5293400 Contactless linking device for interconnecting data bus sections
03/02/1994	EP0584581A1 Broadband tunnel radio system
02/1994
02/23/1994	CN2157632Y Short-range radio beeper
02/21/1994	CA2104555A1 Pager with reverse paging facility
02/21/1994	CA2104544A1 Remote position determination system
02/17/1994	WO1994004010A1 Concert audio system
02/17/1994	CA2139866A1 Concert audio system
02/15/1994	US5287266 Intelligent shopping cart system having cart position determining capability
02/15/1994	US5287112 High speed read/write AVI system
02/09/1994	EP0581847A1 System for transmitting data between the ground and moving vehicles, particularly in ground/train communication
02/08/1994	CA1326889C Transponder
02/03/1994	WO1994003002A1 Frequency hopping time-diversity communications systems and transceivers for local area networks
02/02/1994	CN1081547A Improved system for transmitting and receiving
01/1994
01/20/1994	WO1994001846A1 Arrangement, in particular in vehicles, for transmitting electric signals by connecting lines
01/19/1994	EP0578752A1 Inconspicuous communication method utilizing remote electromagnetic drive.
01/12/1994	CN2153182Y Radio calling apparatus for service trades
01/05/1994	CN2152353Y Bidirectional intelligent monitor for people and article
01/04/1994	US5276910 Energy recovering hearing system
12/1993
12/29/1993	EP0533709B1 Process and system for transmitting energy and data
12/08/1993	EP0572382A1 Three wire system for cochlear implant processor.
12/08/1993	CN2149066Y Multi-function remote-control voltage-regulating apparatus
12/01/1993	CN2148443Y Radio simultaneous interpretation arrangement
11/1993
11/25/1993	WO1993023909A1 A primary inductive pathway
11/25/1993	WO1993023908A1 A non-contact power distribution system
11/25/1993	DE4225800C1 Response device for information transmission system - provides additional energy for coded response signal transmission by energy store in response to interrogation signal
11/24/1993	CN2147695Y Very high frequency sound controlling wireless telephone
11/09/1993	US5260701 Bidirectional inductive transmission of data with slave station supplied by the master
11/03/1993	CN2145480Y Electronic intercommunication door bell
10/1993
10/26/1993	US5257290 Transmission line termination of guide-communications wire for guided vehicles
10/20/1993	EP0557297A4 Method and apparatus for modulating and dectecting a subcarrier signal for an inductively coupled transponder
10/20/1993	CN2144376Y Universal remote-controller with secondary signal identification function
10/13/1993	CN1077321A Radio selective call receiver
10/06/1993	CN1077067A Paging receiver
09/1993
09/29/1993	EP0562825A1 Method and apparatus for radio transmission using leaky cables
09/29/1993	CN1022281C Broadcust system inside road
09/29/1993	CN1022280C Transmission system
09/14/1993	US5245335 Transceiver system for communication over wire laid along the path of guided/vehicles
09/01/1993	EP0558316A1 An inductive loop power transmission system
09/01/1993	EP0557297A1 Method and apparatus for modulating and dectecting a subcarrier signal for an inductively coupled transponder
08/1993
08/10/1993	US5235326 Multi-mode identification system
08/10/1993	CA1321248C Device for transmitting wideband information and/or instructions between an element moving in a plane and a control station
08/04/1993	CN2139758Y Multipath wireless coding telecontroller
08/04/1993	CN1075037A Power saving method of pager
08/03/1993	US5233344 Individual selective call receiving apparatus
07/1993
07/22/1993	WO1993014474A1 Method and device for electronic identification
07/22/1993	CA2128432A1 Method and device for electronic identification
07/20/1993	US5230085 Method and apparatus for wireless electromagnetic communication within a contained electromagnetic field
07/20/1993	US5230080 Ultra-high frequency communication installation
06/1993
06/23/1993	CN1073559A Communication system of vertical shaft for mine
06/15/1993	US5218861 Pneumatic tire having an integrated circuit transponder and pressure transducer
06/15/1993	CA1319172C Intrinsically safe battery current limiter circuit
06/08/1993	US5218189 Binary encoded multiple frequency rf indentification tag
06/02/1993	CN2135218Y Slope mine signal transmitter
06/02/1993	CN1072808A Communicating and controlling method for motor vehicle in running
05/1993
05/25/1993	US5214568 Transmission system
05/19/1993	CN2133997Y Wireless apparatus for calling children
05/19/1993	CN2133996Y Radio broadcast transceiver for tour guiding
05/19/1993	CN2133995Y Automatic stop reporting transceiver for city bus
05/19/1993	CN2133994Y Remote-controller for automatically turning on or off power

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