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)
12/2004
12/08/2004	EP1484816A1 Antenna for reader/writer and reader/writer having the antenna
12/08/2004	EP1483902A1 Motion tracking system and method
12/08/2004	EP1483856A2 Near-field spatial multiplexing
12/08/2004	EP1483733A1 Inductive coupling exchange in a portable intelligent object with central and peripheral circuits
12/08/2004	EP1145203A4 Auto-tuning scanning proximity reader
12/08/2004	CN1553692A Mobile data receiving method and apparatus by computer
12/07/2004	US6829467 Apparatus for settling accounts and method of settling accounts
12/07/2004	US6827280 Transponder in power down mode during load modulation
12/02/2004	US20040240403 Method and apparatus for distributing information
12/01/2004	EP1198783B1 Data carrier having means for synchronization with a received data stream
12/01/2004	CN2660827Y Blueteeth GSM dual mode radio telephone
12/01/2004	CN2660794Y Blueteeh radio sensor based on blueteeth communication protocal
12/01/2004	CN1551657A Bluetooth headset and method for informing user of incoming call signal using the same
12/01/2004	CN1551046A IC card
12/01/2004	CN1178406C Shot-range magnetic communication system
11/2004
11/30/2004	US6825751 Data communication apparatus, wristwatch type electronic device, and authentication system
11/30/2004	US6825737 Device for broadband electrical signal transmission using a bi-directional transmission system
11/25/2004	US20040233879 Method and system for data transmission
11/25/2004	US20040233591 Rectifier utilizing a grounded antenna
11/25/2004	US20040233043 Communication system
11/24/2004	EP1479030A1 Switching device actuated with a transponder
11/24/2004	CN1549986A Non - contact intelligent card query device for change of transmission line two
11/24/2004	CN1549463A Blueteeth apparatus capable of transmitting stereo
11/24/2004	CN1177490C Circuit and method for providing simultaneous transmission of page data paging system
11/23/2004	US6823171 Garment having wireless loopset integrated therein for person with hearing device
11/18/2004	US20040229658 Bluetooth headset and method for informing user of incoming call signal using the same
11/18/2004	US20040228400 Communication method of contactless ID card and integrated circuit used in communication method
11/18/2004	US20040227619 Electronic circuit for contactless tag, and contactless tag
11/18/2004	US20040227002 Electronic circuit for contactless tag, and contactless tag
11/18/2004	DE202004009748U1 Luggage protection device e.g. for theft protection of luggage, has coding-switch, which can be supervised and radio end unit with owner notified via alarm unit of when distance threshold is reached
11/17/2004	EP1478049A1 Onboard vehicle communication device and portable identifyng device for communicating with it
11/17/2004	EP1477953A2 Moving body detection system
11/17/2004	EP1476849A2 Electromagnetic transponder with a programmable code
11/17/2004	CN2657319Y Hand-held mobile communication terminal equipment
11/17/2004	CN2656312Y Protective cover for remote controller
11/17/2004	CN1176523C Blue-tooth geographic positioning technology and device for telephone line site or telephone booth
11/16/2004	US6819221 Method of determining a time value representing at least a part of the communication time interval of a transponder with a communication device
11/16/2004	US6817412 Method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system
11/11/2004	WO2004098089A1 Circuit for contractless device having active and passive send modes
11/11/2004	WO2004097725A1 Communication device and wireless tag reader/writer
11/11/2004	WO2004034440A3 Current integrating sense amplifier for memory modules in rfid
11/11/2004	US20040222889 Contactless data communication system, contactless identification tag and contactless identification tag control program
11/11/2004	DE202004011600U1 Time signal receiver circuit has a modulator coupled to its antenna circuit to provide it with an additional data transfer capability, and a switchable filter section to provide increased receiving bandwidth
11/11/2004	DE10315744A1 Mikrofon mit HF-Sender Microphone with RF transmitter
11/10/2004	EP1474776A1 Adapting coil voltage of a tag to field strength
11/10/2004	EP1474770A1 Label identification system and coding method suited therefor
11/10/2004	CN2655525Y Wireless speak apparatus for bluetooth communication system
11/10/2004	CN2655172Y Exploration wire length detector
11/10/2004	CN1175696C Equipment and method for adding blue-tooth function on cellular telephone and smart Phone platform
11/10/2004	CN1175588C Information communication system, non-contact IC card and IC chip
11/10/2004	CN1175375C RFID tag installing structure, RFID tag installing method and RFID tag communication method
11/10/2004	CN1174703C Desk comprising integrated reading device
11/09/2004	US6814295 Frequency sensor for each interface of a data carrier
11/09/2004	US6814284 Enhancement antenna for article identification
11/04/2004	US20040218574 Service providing apparatus, service providing program and service providing method
11/04/2004	US20040217171 Electronic identification label and interrogator for use therewith
11/04/2004	DE10314973A1 Data glove for virtual reality applications comprises sensors arranged over the glove with at least one having a surface wave transponder that communicates with an interrogation and receiving unit via electromagnetic signals
11/03/2004	EP1473663A2 Electronic identification label and interrogator for use therewith
11/03/2004	EP1472642A1 Coupling enhancement antenna for article identification
11/03/2004	EP1309938B1 Antenna generating an electromagnetic field for transponder
11/03/2004	EP1099200B1 Optical interface between receiver and tag response signal analyser in RFID system for detecting low power resonant tags
11/03/2004	CN1542673A Electronic identification label and interrogator for use therewith
11/03/2004	CN1174342C Frequency sensor for each interface of data carrier
11/02/2004	US6813316 Array for the transmission of electrical energy or signals
11/02/2004	US6813209 Current integrating sense amplifier for memory modules in RFID
11/02/2004	US6812823 Unlock operation system of a vehicle door
11/02/2004	US6812046 Method and apparatus for electronically aligning capacitively coupled chip pads
10/2004
10/28/2004	WO2004093488A2 Directional speakers
10/28/2004	WO2004093341A1 Remote communication device by inductive coupling with multi-level modulation
10/28/2004	US20040214614 Mobile phone and hands-free kit with inductive link
10/28/2004	DE19541634B4 Zugangskontrollvorrichtung zum Verarbeiten einer den Zugang passierenden berührungslosen Chipkarte Access control apparatus for processing an access passing contact IC card
10/27/2004	EP1470613A2 Intelligent station using multiple rf antennae and inventory control system and method incorporating same
10/27/2004	CN2652067Y Bluetooth telephone on board
10/27/2004	CN2652063Y Bi-directional wireless transmit-receive calling devices
10/27/2004	CN1541371A Data carrier having active signal processing circuit and passive signal processing circuit
10/27/2004	CN1173593C Mobile telephone and its communication method
10/21/2004	US20040209654 Directional speaker for portable electronic device
10/21/2004	US20040208333 Directional hearing enhancement systems
10/21/2004	US20040208325 Method and apparatus for wireless audio delivery
10/21/2004	US20040208324 Method and apparatus for localized delivery of audio sound for enhanced privacy
10/21/2004	US20040207527 Identification tag utilizing charge pumps for voltage supply generation and data recovery
10/20/2004	CN1539118A Transponder in powre down mode during load modulation
10/20/2004	CN1538725A Equipment for realizing automatic detecting handset in handset rest station and its method
10/20/2004	CN1538632A Intelligent mobile identification method based on blue teeth technology and its application
10/14/2004	WO2004088873A1 Microphone comprising an hf transmitter
10/14/2004	US20040204053 Wireless electronic memory device
10/14/2004	US20040204048 Information distribution system for improved response to safety and security incidents
10/14/2004	US20040203974 Method and wireless device for providing a maintenance notification for a maintenance activity
10/14/2004	US20040203886 Contextual information management in wireless communications devices and methods therefor
10/14/2004	US20040203413 Wireless communication system and image forming device
10/14/2004	US20040203391 Contact-free data communications system, data communications device, contact-free identification tag, program for controlling the contact-free identification tag, and program for controlling the data communications device
10/14/2004	US20040203381 Method and apparatus for data transfer
10/14/2004	US20040203365 Radio communication with an intended device
10/14/2004	US20040203356 Master communication apparatus used in radio lan system, and control method and control program of master communication apparatus
10/14/2004	US20040202255 Dual polarity coding system and method for a millimeter wave communication system
10/14/2004	US20040201453 Non-contact smart card interrogator, wherein across a transmission line from an antenna to a receiver the signal modulation varies between amplitude modulation and phase modulation
10/14/2004	DE10310801A1 Signal transmission device for transmitting interrelated measurement data between a computer tomography device's rotating and stationary parts operates a transmitter and a receiver
10/13/2004	EP1287507A4 Event driven information system
10/13/2004	CN1536860A Method for implementing permanent call and blue-tooth handset call diversion
10/13/2004	CN1536777A Plug and play network speech communication method and its network speech electronic device

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