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Class Information
Number: 343/867
Name: Communications: radio wave antennas > Antennas > Loop type > Plural; plural or tapped coils
Description: Subject matter including a plurality of distinct coils or windings, or including one or more taps on a coil or winding to vary the effective number of coil or winding turns; or including a plurality of loop type antennas as defined in subclass 866 above.










Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8711897 Split-ring resonator creating a photonic metamaterial Apr. 29, 2014
8693949 Near-field RF communicators having a low-energy pre-polling process Apr. 8, 2014
8686918 Multi-function magnetic pseudo-conductor antennas Apr. 1, 2014
8665167 Antenna circuit, method for reducing resistance of antenna circuit, and transponder Mar. 4, 2014
8665172 Chip carrier for a transponder module and transponder module Mar. 4, 2014
8648762 Loop array antenna system and electronic apparatus having the same Feb. 11, 2014
8648767 Communication device Feb. 11, 2014
8615332 Smart current attenuator for energy conservation in appliances Dec. 24, 2013
8610638 FM transmission using a RFID/NFC coil antenna Dec. 17, 2013
8598983 Transceiver and electronic key including transceiver Dec. 3, 2013
8599094 Loop antenna Dec. 3, 2013
8587489 Dynamic EAS detection system and method Nov. 19, 2013
8587488 Multipurpose antenna unit and a hearing aid comprising a multipurpose antenna unit Nov. 19, 2013
8587407 Media transaction kiosk and method Nov. 19, 2013
8570226 Portable electronic device with near field communication function Oct. 29, 2013
8558751 Dual loop magnetic excitation for mail tag Oct. 15, 2013
8558752 Variable pitch mandrel wound antennas and systems and methods of making same Oct. 15, 2013
8531298 Flexible RFID label Sep. 10, 2013
8532568 Radio receiver and transmitter circuits and methods Sep. 10, 2013
8525741 Multi-loop antenna system and electronic apparatus having the same Sep. 3, 2013
8525731 Small antenna using SRR structure in wireless communication system and method for manufacturing the same Sep. 3, 2013
8519905 Antenna sheet, transponder, and booklet Aug. 27, 2013
8502745 Antenna apparatus Aug. 6, 2013
8494446 Transmitting circuit for a contactless communicating communication partner device Jul. 23, 2013
8489020 NFC communicators implementing coil voltage reduction circuitry Jul. 16, 2013
8482451 Resonant reflector assembly and method Jul. 9, 2013
8477065 Combined transmit/receive single-post antenna for HF/VHF radar Jul. 2, 2013
8471779 Wireless battery-powered remote control with label serving as antenna element Jun. 25, 2013
8462061 Printed compound loop antenna Jun. 11, 2013
8441403 Security document May. 14, 2013
8427316 Detecting tampered with radio frequency identification tags Apr. 23, 2013
8422973 Bidirectional transmission coil and bidirectional transmission system using the same Apr. 16, 2013
8400307 Radio frequency IC device and electronic apparatus Mar. 19, 2013
8378912 Antenna coil Feb. 19, 2013
8378917 Proximity antenna and wireless communication device Feb. 19, 2013
8368607 Antenna assemblies with antenna elements and reflectors Feb. 5, 2013
8362961 Modulated antenna for wireless communications Jan. 29, 2013
8344950 Dual-loop antenna and multi-frequency multi-antenna module Jan. 1, 2013
8319659 Sensor system and method for operating a sensor system Nov. 27, 2012
8284111 Multipart antenna with circular polarization Oct. 9, 2012
8269682 Multi-loop antenna module with wide beamwidth Sep. 18, 2012
8264419 Locating technique and apparatus using an approximated dipole signal Sep. 11, 2012
8242963 Antenna device Aug. 14, 2012
8242967 Multiple-input multiple-output device Aug. 14, 2012
8232929 Microwave antenna for wireless networking of devices in automation technology Jul. 31, 2012
8228251 Ultra-wideband, low profile antenna Jul. 24, 2012
8212735 Near field communication Jul. 3, 2012
8188933 Antenna unit and mobile terminal therewith May. 29, 2012
8177137 Sensor device having non-contact charge function and containers having the same May. 15, 2012
8179330 Omnidirectional wideband antenna May. 15, 2012

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