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)
01/1998
01/29/1998DE19726949A1 Slot-line for contactless information transmission
01/28/1998EP0821430A2 Loop antenna
01/28/1998EP0820646A1 Antenna system, in particular an antenna system for traffic communications systems
01/22/1998WO1998002980A1 Device for transmitting and receiving digital data by electromagnetic induction and inductive coupling
01/14/1998CN1170468A Contactless energy and data transmission system
01/14/1998CN1170467A Contactless energy and data transmission system
01/07/1998EP0814994A1 Track-guided transport system with power and data transmission
01/07/1998EP0715752A4 Article-information display system using electronically controlled tags
12/1997
12/31/1997CN2271781Y Medical clinical radio calling receiving central unit
12/30/1997US5703766 Capacitor power supply for intermittent transmission
12/24/1997WO1997049076A1 Enhanced range transponder system
12/24/1997WO1997049075A1 Antenna multiplexer with isolation of switching elements
12/23/1997US5701240 Apparatus for powering a transmitter from a switched leg
12/11/1997WO1997047095A1 System and method for providing useful information for a moving object
12/11/1997WO1997047056A1 Coaxial cable tap
12/11/1997CA2257219A1 Coaxial cable tap
12/04/1997DE19651719A1 Secondary circuit arrangement for wireless transceiving system
12/03/1997EP0809906A1 Very low power cordless headset system
12/02/1997US5694516 Capacitive interface for coupling between a music chip and audio player
12/02/1997US5694418 System and method for determining EPL message transmission retries
11/1997
11/27/1997DE19654912A1 Rectifier circuit for LV inputs e.g. for signal- or location- systems
11/26/1997CN1166096A Digital selecting-pass radio microphone aid system for electrical teaching
11/20/1997DE19654911A1 Oscillator with feed back amplifier and tuner circuit
11/20/1997DE19620127A1 Energy supply method for two rail vehicle generating electromagnetic signal marker
11/18/1997US5689804 Medium-frequency radio transmission system
11/12/1997EP0806849A2 Circuit arrangement for performance check of mobile broadcast reception systems
11/12/1997EP0806099A1 Communication method
11/12/1997CN2267580Y Keyboard structure for paging device
11/06/1997DE19708004A1 Paging message processing system
10/1997
10/22/1997CN2265638Y Fully automatic radio-controlled sound-changeable number calling device
10/22/1997CN1036238C Radio selective call receiver
10/21/1997US5680459 Passive transponder
10/16/1997WO1997038395A1 Portable electronic object for remote information exchange
10/16/1997WO1997038391A1 Portable electronic object for remote information exchange
10/15/1997EP0801472A1 Radio communication system between a vehicle and a roadside station
10/15/1997EP0801358A2 Method and system for operating a system composed of a base station and a contactless coupled transponder
10/15/1997EP0800727A1 Method and apparatus for radio telephone call handover in an underground railway communications system
10/14/1997US5678202 For receiving an electromagnetic signal
10/14/1997CA2071504C Golf cart control system
10/09/1997DE19652579A1 Moving object identification device
10/08/1997CN1161760A Antenna coil
10/01/1997EP0798681A1 Pulsed interrogation signal in harmonic EAS system
09/1997
09/29/1997CA2200533A1 Pulsed interrogation signal in harmonic eas system
09/24/1997EP0797317A1 Receiving device for signals sent by an active implanted medical device
09/23/1997US5670941 Terminal for contactless communication with portable objects
09/17/1997EP0795165A1 Non-contacting type radio frequency recognizing credit card system
09/16/1997US5668884 Enhanced concert audio system
09/10/1997EP0794501A2 Information transmitting method and basestation for receiving information
09/10/1997CN1159237A Supply voltage processing circuit and data carrier with supply votlage processing circuit
09/03/1997EP0578752B1 Inconspicuous communication method utilizing remote electromagnetic drive
09/03/1997CN2261692Y Mobile telephone tracer
08/1997
08/28/1997WO1997031431A1 Method and apparatus for reducing audio interference from cellular telephone transmissions
08/27/1997EP0792030A2 Dual mode receiver having battery saving capability
08/27/1997CN1158060A Automatic mode converting method for setting operation mode by periods of time in radio pager
08/26/1997US5661286 Noncontacting IC card system and gate facility and antenna mechanism
08/21/1997WO1997018634A3 Communications system
08/20/1997EP0790667A1 Method for realisation of a portable object with a coil antenna
08/20/1997CN1157538A Telephone number searching method of radio pager
08/14/1997WO1997029550A1 Digital wireless speaker system
08/14/1997DE19604467A1 Bicycle computer for determining, transmitting and indicating data
08/14/1997CA2244191A1 Digital wireless speaker system
08/13/1997EP0789474A2 A hands-free arrangement for mobile communication device
08/13/1997EP0788637A1 Contactless energy and data transmission system
08/13/1997EP0788633A1 Contactless energy and data transmission system
08/06/1997EP0787339A1 Article-information display system using electronically controlled tags
08/06/1997EP0516723B1 A receiver and transmitter arrangement intended for an electronic price information system
08/05/1997US5654984 Signal modulation across capacitors
07/1997
07/24/1997WO1997026715A1 Enhanced concert audio process utilizing a synchronized headgear system
07/24/1997CA2242397A1 Enhanced concert audio process utilizing a synchronized headgear system
07/23/1997EP0208711B1 Dc to dc converter
07/16/1997CN2257975Y Source remote-control switch
07/15/1997CA2057544C Communication system
07/09/1997CN1154053A Automatic adjustment delay circuit for simulcast of paging system and method thereof
07/02/1997EP0782363A2 Communication system and method using two-way paging to provide call control
06/1997
06/26/1997WO1997023060A1 Apparatus for bidirectional data and unidirectional power transmission between master and slave units using inductive coupling
06/26/1997WO1997023059A1 System and method for channel allocation in a radio telephone system for an underground railway
06/26/1997DE19549284A1 Train influencing device for point-wise transfer of data related to direction of travel from track to passing vehicles
06/26/1997CA2240438A1 Apparatus for bidirectional data and unidirectional power transmission between master and slave units using inductive coupling
06/25/1997EP0780822A1 Method and device for contactless transmission of measured values
06/25/1997EP0780027A1 Antenna coil
06/25/1997CN1152846A Method and circuit of prolonging service life of pager cell by using solar energy cell
06/18/1997CN1152245A Wide area wireless paging system and area determining method of wireless pager
06/18/1997CN1152219A Character reception display device and method of radio paging receiver
06/18/1997CN1152218A Filter device and dual-band system in which filter device is used
06/17/1997US5640693 Transmitter for pulsed electronic article surveillance systems
06/12/1997WO1997020710A1 Non-contacting device for the transmission of signals between vehicle parts which moves linearly with respect to each other
06/12/1997DE19545220A1 Anordnung zum kontaktlosen Übertragen von Signalen zwischen gegeneinander linear bewegbaren Fahrzeugteilen Arrangement for contactless transmission of signals between mutually linearly movable vehicle parts
06/05/1997DE19544474A1 Controlled access to internal building systems
06/03/1997US5635693 System and method for tracking vehicles in vehicle lots
05/1997
05/28/1997EP0775918A2 Transmission-reception system
05/28/1997EP0775792A1 Automatic answering system using transponder
05/28/1997EP0748491A4 Electronic identification system
05/28/1997EP0556269B1 Receiver with automatic frequency control
05/22/1997WO1997018634A2 Communications system
05/22/1997WO1997018534A1 Queue management system
05/21/1997EP0651925A4 Frequency hopping time-diversity communications systems and transceivers for local area networks.
05/21/1997CN1034979C Voice automatic calling system
05/15/1997DE19612522A1 HF oscillator circuit for data transmission
05/15/1997DE19541650A1 Wire antenna, e.g. for video signal transmission between video camera and moving train
05/14/1997EP0772839A2 Supply voltage processing circuit and a data carrier with a supply voltage processing circuit
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