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Class Information
Number: 340/572.5
Name: Communications: electrical > Condition responsive indicating system > Specific condition > Article placement or removal (e.g., anti-theft) > Detectable device on protected article (e.g., "tag") > Having tuned resonant circuit
Description: Subject matter where the device or tag has a circuit which is capable of adjusting to respond to a particular frequency wave.

Patents under this class:
1 2 3 4 5 6 7 8 9 10

Patent Number Title Of Patent Date Issued
8704638 Electronic article surveillance system with metal detection capability and method therefor Apr. 22, 2014
RE44793 Method for monitoring and assembling equipment Mar. 4, 2014
8659428 Method and system for reducing effect of interference in integrated metal detection/electronic article surveillance systems Feb. 25, 2014
8648721 Security tag with integrated EAS and energy harvesting magnetic element Feb. 11, 2014
8643491 Articles containing chipless radio frequency identification elements Feb. 4, 2014
8643470 Semiconductor integrated circuit, IC card mounted with the semiconductor integrated circuit, and operation method for the same Feb. 4, 2014
8634772 Communications device, resonant circuit, and method of applying control voltage Jan. 21, 2014
RE44691 Multi-frequency identification device Jan. 7, 2014
8618914 MEMS sensor enabled RFID system and method for operating the same Dec. 31, 2013
8614648 Antenna module, magnetic material sheet and double-sided adhesive spacer, and methods for the manufacture thereof Dec. 24, 2013
8608087 Smart card capable of independently displaying information Dec. 17, 2013
8604908 Article storage system with closely-coupled, article-specific display Dec. 10, 2013
8604902 Communication system, information processing method, and program product Dec. 10, 2013
8581707 Methods and apparatus for identifying and categorizing distributed devices Nov. 12, 2013
8564410 Shipping container security process Oct. 22, 2013
8536982 Automatic tuning for RFID systems by changing capacitor values in case of an error Sep. 17, 2013
8505826 Anti-interrogation for portable device Aug. 13, 2013
8502675 Remotely powered and remotely interrogated wireless digital sensor telemetry system to detect corrosion Aug. 6, 2013
8502669 Extended functionality of RFID devices Aug. 6, 2013
8487737 Flexible control panel Jul. 16, 2013
8469281 RFID label with shielding element Jun. 25, 2013
8451124 Passive wireless readout mechanisms for nanocomposite thin film sensors May. 28, 2013
8446254 Methods and apparatuses for RFID tag range determination May. 21, 2013
8446259 Authentication of an electromagnetic terminal-transponder couple by the transponder May. 21, 2013
8421617 Tracking system with separated tracking device Apr. 16, 2013
8416061 Controlling radio frequency identification tag signal range Apr. 9, 2013
8400274 Accurate persistent nodes Mar. 19, 2013
8395485 Inductive evaluation of the coupling factor of an electromagnetic transponder Mar. 12, 2013
8378788 Variable frequency tag Feb. 19, 2013
8373560 Communication apparatus and portable communication terminal using the same Feb. 12, 2013
8368514 Device for wireless operation and method for operating the device Feb. 5, 2013
8368515 Dual mode RFID communication device operating as a reader or tag Feb. 5, 2013
8358212 Multi-modal transponder and method and apparatus to detect same Jan. 22, 2013
8350674 RFID tag including a loop antenna and RFID system using the RFID tag Jan. 8, 2013
8334751 Systems and methods for managing inventory of items held in a cabinet using radio frequency identification (RFID) Dec. 18, 2012
8325011 Multiple radio frequency network node RFID tag Dec. 4, 2012
8325018 Method and apparatus to reduce data lost on personal mobile devices Dec. 4, 2012
8314706 Coupled radio frequency identification (RFID) and biometric device Nov. 20, 2012
8310345 Receiving apparatus Nov. 13, 2012
8305217 Field improving system provided with resonator Nov. 6, 2012
8264357 Wireless IC device Sep. 11, 2012
8264359 High reliability surveillance and/or identification tag/devices and methods of making and using the same Sep. 11, 2012
8264618 Remote control apparatus Sep. 11, 2012
8258928 RFID system and RFID tag thereof Sep. 4, 2012
8242913 RFID tag communication apparatus Aug. 14, 2012
8228175 RFID tag chips and tags with alternative behaviors and methods Jul. 24, 2012
8228194 Recharging apparatus Jul. 24, 2012
8222999 Commodity display position alert system and commodity display position alert method Jul. 17, 2012
8203429 Switched capacitance method for the detection of, and subsequent communication with a wireless transponder device using a single antenna Jun. 19, 2012
8198987 Radio tag reading device and radio tag recognition method using the device Jun. 12, 2012

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