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)
07/1998
07/28/1998US5786763 Antenna multiplexer with isolation of switching elements
07/28/1998US5785403 Portable audio-visual apparatus of wireless microphone combined with laser indicator
07/23/1998WO1998032217A1 Arrangement for the contactless transmission of electric energy and/or electric signals
07/23/1998WO1998024527A3 Data communication apparatus
07/21/1998US5784686 IQ combiner technology in modulated backscatter system
07/15/1998EP0853288A2 Encryption for modulated backscatter systems
07/09/1998WO1998029919A1 Device for contactless transmission of electrical signals and/or energy
07/09/1998WO1998029760A1 Radioelectric transponder equipped with frequency detuning antenna and circuit
07/09/1998CA2275939A1 Radioelectric transponder equipped with frequency detuning antenna and circuit
07/01/1998EP0851639A2 QPSK modulated backscatter system
07/01/1998EP0851599A1 Inexpensive modulated backscatter reflector
07/01/1998EP0851377A1 Passenger, baggage, and cargo reconciliation system
06/1998
06/30/1998US5774796 Airplane pilot communication aid
06/30/1998US5774791 Low power wireless communication system employing magnetic control zones
06/30/1998US5774062 Tag responsive to high-frequecy for varying capacitance of tuning capacitor
06/30/1998CA2222320A1 Inexpensive modulated backscatter reflector
06/30/1998CA2219266A1 Qpsk modulated backscatter system
06/30/1998CA2219075A1 In-building personal pager and identifier
06/30/1998CA2218805A1 Passenger, baggage, and cargo reconciliation system
06/25/1998WO1998027670A1 Wireless communication system including a plurality of selectable antennas and wireless communications methods
06/25/1998WO1998026939A1 Semiconductor device and method for manufacturing the same
06/25/1998CA2273945A1 Semiconductor device and manufacturing method thereof
06/24/1998EP0849121A1 Procedure for wireless power and data transmission
06/23/1998US5771438 Short-range magnetic communication system
06/18/1998WO1998026534A1 Authentication system and method for a remote keyless entry system
06/18/1998WO1998026517A1 Installation for data transmission from sources geographically distributed in a zone
06/18/1998WO1998026371A1 Data exchanging system with communication with or without contact between a terminal and portable objects
06/18/1998WO1998026370A1 Data exchange system by contactless communication between a terminal and remote powered portable objects
06/18/1998CA2245905A1 Data exchanging system with communication with or without contact between a terminal and portable objects
06/17/1998EP0848123A2 A remote keyless entry system
06/17/1998EP0847341A1 Audio device for vehicles, especially motor vehicles
06/17/1998CN1185065A System and method for near-field human-body coupling for encrypted communication with identification cards
06/16/1998US5768050 Hard disk drive using a rotary actuator and having an isolated voice coil motor
06/16/1998US5767787 Reduced size radio selective call receiver with a tactile alert capability by sub-audible sound
06/16/1998US5767786 Method of providing voice memos in a selective call receiver
06/11/1998WO1998025439A1 Hearing enhancement system
06/11/1998WO1998024527A2 Data communication apparatus
06/11/1998CA2274096A1 Hearing enhancement system
06/11/1998CA2273489A1 Data communication apparatus
06/04/1998DE19649682A1 Device for contactless signal- and energy-transmission between mobile units
05/1998
05/28/1998WO1998022903A1 Method for communicating with a plurality of contactless data carriers and contactless data carrier for use therein
05/27/1998CN1182988A Paging anti-counterfeit tech. for commodity
05/26/1998US5755367 Holder fitting structure
05/20/1998EP0843425A2 Electronic communication apparatus using the human body as a transmission medium
05/20/1998EP0843407A1 Signal detecting circuit
05/20/1998CN1182272A Insulated conductor pair and guide cable using the same
05/14/1998WO1998020626A1 Aerial arrays for inductive communication systems
05/14/1998WO1998011689A3 Method of cryptological authentification in a scanning identification system
05/14/1998WO1998007244A3 Diversity circuit for magnetic communication system
05/13/1998CN1181845A Antenna system, in particular an antenna system for traffic communications systems
05/07/1998DE19644503A1 Electric signal transmitter with signal source
05/06/1998EP0840395A2 An insulated conductor pair and a guide cable using the same
05/06/1998EP0780027B1 Antenna coil
05/05/1998US5749049 Method and apparatus for measuring the inherent capacitance of a circuit supporting substrate
04/1998
04/29/1998EP0838694A1 Non-contact information storage medium and data transmission method for the medium
04/29/1998CN1180335A Track-guided transport system with power and data transmission
04/29/1998CN1180267A Communication method for telephone central transceiver and wire or radio telephone central transceiver
04/23/1998WO1998017014A1 Data-transmission circuit with a station and a response circuit
04/23/1998DE19642568A1 Datenübertragungsschaltung mit einer Station und mit einer Antwortschaltung Data transmission circuit with a station and a response circuit
04/21/1998US5741315 Apparatus for receiving telemetry signals from active implantable medical devices
04/21/1998US5741314 Embedded data link and protocol
04/21/1998CA2118815C Improved electromagnetic hearing system
04/15/1998EP0788633B1 Contactless energy and data transmission system
04/15/1998CN1038094C Method for controlling pager
04/09/1998WO1998015069A1 Wireless energy and data transfer for a modular peripheral system
04/08/1998EP0834999A1 Leaky feeder communications system and corresponding equipment for a subscriber installation
04/07/1998US5736967 Article-information display system using electronically controlled tags
04/02/1998WO1998013948A1 Electromagnetic communication between elongate structures
04/02/1998DE19640367A1 Leitungslose Energie- und Datenübertragung für ein modulares Peripherie-System Line contact energy and data transmission for a modular peripheral system
04/02/1998DE19638129A1 Output controlling method esp. for time-division multiplex transmitter
04/01/1998CN2277603Y Wire and wireless integrated telephone
03/1998
03/26/1998WO1998012677A1 Pager with voice and data messages
03/25/1998EP0831416A2 Device for inductive high-frequency data exchange
03/25/1998EP0830754A1 Linear coverage area antenna system for a cdma communication system
03/24/1998US5731691 Power supply circuitry for a transponder and operable with infinitesimal power from receiving antenna
03/19/1998WO1998011689A2 Method of cryptological authentification in a scanning identification system
03/19/1998WO1998011553A1 Ram storage assembly
03/19/1998WO1998011505A1 Method for tuning an oscillating receiver circuit of a transponder built into a rfid system
03/19/1998WO1998011496A1 Data transfer method for a scanning identification system
03/19/1998WO1998010964A1 Immobilizer system-mounting vehicle and member used for the immobilizer system
03/18/1998CN2276689Y Remote-controller apparatus
03/17/1998US5729697 Intelligent shopping cart
03/17/1998US5729219 Selective call radio with contraposed touchpad
03/17/1998US5729196 Personal location and message system and unit
03/11/1998CN1175802A Loop antenna
03/05/1998WO1998009411A1 Wireless powered communication device using power signal sampling and method
03/04/1998EP0827100A2 Communication system and method
03/04/1998CN1175043A Data processor and method and data transmitting/receiving device and method
02/1998
02/25/1998EP0824799A1 System for non-contact sensing and signalling using human body as signal transmission medium
02/24/1998US5721535 Tag responsive to high frequency for varying capacitance of capacitor in power source
02/19/1998WO1998007244A2 Diversity circuit for magnetic communication system
02/18/1998EP0824245A1 Mobile object carrying electronic data which can read and/or write contactlessly
02/18/1998CN1173794A Bidirectional radio paging system without limiting destinations and method therefor
02/18/1998CN1173786A Method for urging transmission of answer message in bilateral pager
02/17/1998US5719827 Highly stable frequency generator
02/12/1998WO1998006176A1 Selective call radio with contraposed touchpad
02/11/1998EP0823136A1 Coaxial cable tap
02/11/1998EP0823059A1 Interrogator for electronic identification system
02/10/1998US5717411 Radiating waveguide and radio communication system using same
02/04/1998CN1172563A Radio telephone call switchover
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