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6791451 System and method for improving the security of storage of firearms and other objects, and for aiding the recovery of such if removed from storage  
A novel technique and system for improved monitoring of the storage security of firearms (and other objects) and, through a microprocessor radio-controlled transceiver embedded within the firearm,...
6784787 Identification system  
A method and system for identifying a plurality of transponders in an interrogation involves transmitting an interrogation signal to the transponders and receiving, at a reader, response signals...
6784789 Method and apparatus for verifying RFID tags  
An RFID tag verifier includes an RF interrogator that transmits a first and second interrogation signal each having a first operational characteristic that differs from the other by a known...
6765484 Method and apparatus for supplying commands to a tag  
An apparatus (10, 240, 300) includes a signpost (11, 241-256, 322, 612, 623, 626-628, 652, 661, 682, 686, 703) which transmits signpost signals (24) to a tag (12, 271-275, 301-316, 395-397,...
6747567 Remote controlled electronic apparatus and remote control method thereof  
An electronic apparatus wherein a remote control signal received via a filter is decoded and, upon deciding that the control signal is a power cutoff instruction, a controlling microcomputer...
6731199 Non-contact communication system  
In a non-contact communication system, when an interrogator is attempting to detect that a responder is present in a range communicable therewith, the interrogator transmits a weak radio wave from...
6724297 Multiple read method and system for a set of tags bearing distinct ID codes  
A method and device for reading a set of tags, each with an ID code, of N bits, wherein the identification of these codes is carried out successively, bit by bit, by scanning a binary search tree...
6707376 Pulsed power method for increased read range for a radio frequency identification reader  
A method to power a radio frequency identification (RFID) reader to increase multi-tag reading capability and increase the reading range of a passive tag without maximizing the continuous...
6707375 Keyless entry apparatus capable of selectively controlling only member to be controlled closest to user  
A keyless entry apparatus includes an on-vehicle transmitting and receiving device mounted on a vehicle, and a portable transmitting and receiving device. The on-vehicle transmitting and receiving...
6686830 Homodyne I/Q transceiver for a spread spectrum reader  
An improved homodyne receiver I/Q receiver for use in RFID and similar applications. The receiver uses a lumped constant network approach to eliminate costly and bulky couplers, circulators and...
6687293 Method, system and apparatus for calibrating a pulse position modulation (PPM) decoder to a PPM signal  
A radio frequency identification (RFID) tag device having a pulse position modulation (PPM) decoder circuit which calculates a relative frequency relationship between an internal oscillator of the...
6650230 Modulated backscatter wireless communication system having an extended range  
A modulated backscatter communication system (e.g., an Electronic Shelf Label (ESL) system) includes a central node (e.g., a ceiling node) and one or more remote nodes (e.g., ESL tags). The...
6650229 Electromagnetic transponder read terminal operating in very close coupling  
A terminal for generating an electromagnetic field adapted to cooperating with at least one transponder when the latter enters its field, the terminal including an oscillating circuit adapted to...
6650227 Reader for a radio frequency identification system having automatic tuning capability  
A reader for an RFID system has an exciter circuit for generating an excitation signal and a feedback circuit coupled to the exciter circuit for automatically tuning the exciter circuit. The...
6611198 Electronic reader for reading a special characteristic of an object  
An object identification system and method detects the presence of a target object in a field of inspection and in one aspect of the invention, generates a first signal if the object is left in...
6608995 Detection circuit for proximity IC card device  
The present invention relates to a proximity IC card (PICC). More particularly, the present invention relates to and provides a detection circuit of a simple structure, which is easy to set up in...
6603391 Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator  
The present invention includes phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator. One aspect of the present invention provides...
6570491 Associating a hand control unit  
A remote control system includes at least one hand control (2) and one or more control units (4). Each control units transmits a signal with a unique frequency. The hand control receives this...
6552649 Vehicle control system  
In a vehicle control system that is able to accurately recognize an approaching user, excessive detection operations are suppressed to reduce battery consumption. Control is performed at an...
6549115 Vehicle security system with active and passage remote actuation  
A vehicle security system has an access monitoring device which includes an access control part and/or an electronic immobilizing device which comprises an immobilizer control part, located on the...
6535109 System and method for communicating with multiple transponders  
The object of the invention is a system and method for identifying and communicating with a plurality of transponders which are at the same time in the same interrogation field. The system is...
6531957 Dual mode transmitter-receiver and decoder for RF transponder tags  
An enhanced backscatter RF-ID tag reader system and multiprotocol RF tag reader system is provided. In a multiprotocol mode, the system emits a non-stationary interrogation signal, and decodes a...
6525649 Non-contact communication system and interrogator used therefor  
A non-contact communication system and an interrogator used therein achieve communication of information with a responsor, regardless of whether the responsor adopts a signal superimposition...
6501381 Security system for monitoring the passage of items through defined zones  
A security system for monitoring the presence of one or more objects in a monitored zone. The system includes an antenna and at least one tag having a tuned resonant circuit, the tag being...
6498923 Telecommunication device  
A data communication apparatus according to the present invention can be used both in one-wave mode and two-wave mode, and includes: first and second tuning circuits (1, 2); a power supply circuit...
6496112 Radio frequency identification tag with a programmable circuit state  
A radio frequency identification tag (16) includes stored tag information (56) and at least one antenna element (30). The tag also includes a programmable tag circuit state that is either “on” or...
6491230 Contactless badge reader  
A reader for contactless badges which includes a transmitter and receiver. The transmitter and receiver operate on the same carrier frequency, and are connected by a coupling circuit to an...
6483426 Method of identifying a plurality of transponders, analysis apparatus and a transponder for implementing such a method  
A method identifying a set of transponders situated in the interrogation field of analysis apparatus, with each transponder storing a different identity code. The analysis apparatus first...
6469618 Method for the identification of electronic cards presented in an investigation zone  
A method for the identification of electronic cards within an investigation zone includes encoding an identification number on M bits distributed into P blocks of Q bits assigned to each...
6463039 Method and apparatus for full duplex sideband communication  
The invention is an apparatus and method for using electromagnetic energy as the means of automatic data collection (ADC). The communication system that comprises the invention utilizes frequency...
6456191 Tag system with anti-collision features  
In a system of communicating between a master communication device and a plurality of slave communication devices, the master determines if any of the plurality of slave devices exist within a...
6452481 Apparatus and operative method for detection and reading of transponders in a controlled passage  
A detection and reading apparatus is provided for detecting the presence and reading a coded transponder that moves through a controlled passage. The apparatus is programmed to control a...
6404339 Radio frequency identification tag arranged with a printable display  
A radio frequency identification tag system (10) utilizes a radio frequency identification tag (16) that includes a display (40). The display has an electrooptic display (458) sandwiched between a...
6384712 Apparatus, system, and method for communication between multiple base stations and radio frequency (RF) tags  
An apparatus, a system, and a method for communication between multiple base stations and radio frequency (RF) transponders (RF Tags) is disclosed. A first radio frequency (RF) base station for...
6367697 Reader arrangement for an electronic identification system having a plurality of reader heads for energizing transponders  
A reader arrangement 22 for an electronic identification system includes a plurality of reader heads 22.1 to 22.4 for energizing transponders 28.1 to 28.n to be read, and a controller 29 therefor....
6356207 DSRC car-mounted equipment  
A DSRC car-mounted equipment which self-diagnoses its communication function and informs the driver of the result, comprising a first local oscillator 30 for generating a car-mounted equipment...
6356198 Capacitive modulation in an electromagnetic transponder  
An electromagnetic transponder is provided that includes an oscillating circuit, an electronic circuit, a rectifying circuit, and a capacitive modulation circuit. The oscillating circuit includes...
6346878 Electronic distance-determining apparatus and electronic security system equipped therewith  
An electronic apparatus for determining the distance between two objects has an interrogation signal generator for generating and transmitting an interrogation signal, and a response signal...
6335685 Apparatus and method for locating containers and contents of containers using radio frequency tags  
A computerized base station system communicates with radio frequency tags attached to one or more objects. Included in the system is a separate position detector that determines the position of...
6320507 Method for synchronization between systems  
An apparatus for synchronized operation of a plurality of EAS systems. The system includes two or more EAS systems. Each EAS system has a receiver for receiving the same RF synchronization signal...
6317027 Auto-tunning scanning proximity reader  
A proximity reader for a radio frequency identification (RFID) system is programmed for determining and storing optimum antenna impedance values to achieve peak antenna resonance at each of...
6313737 Centralized transponder arbitration  
A system and method to store a sequence of data records relating to attributes of interactions between fuel dispensers and tags. The data records may be stored on the tag or at a location remote...
6310558 Selective calling system and selective calling receiver  
A transmission signal frame format includes an address field and a message field. The address field includes a plurality of addresses associated with the subscriber's receivers to be called,...
6297727 Transponder identification and record assembly  
Transponder identification record assembly is suitable for associating an identification code with a code recipient and for maintaining an independent record of the identification code associated...
6297747 Tool or tool holder  
A tool holder for holding a tool has at least one sensor for measuring an operating parameter of the tool holder or the tool during the operation thereof and generating measured value signals...
6294980 Transponder with a frequency detector for protection of security-related data during contactless inductive communication, and an integrated circuit therefor  
A transponder (1) for the contactless communication with a base station (2) comprises an antenna resonant circuit (10) for receiving a modulated HF signal (5), signal processing means (13) for...
6285295 Passive remote programmer for induction type RFID readers  
A hand held passive remote programmer for Radio Frequency Identification readers has a keyboard for turning on any one of several RFID transponder tags in the programmer. Each transponder of the...
6272320 Base station for a contactless interrogation system comprising a phase locked and voltage controlled oscillator  
A base station (13) for a contactless interrogation system includes an oscillating device (23) supplying a control signal having a frequency which is adjustable via adjusting circuits (21, 22), a...
6265962 Method for resolving signal collisions between multiple RFID transponders in a field  
Communications between an RFID interrogator and an RFID transponder require that no more than one transponder be present in the reading range of the interrogator and transmitting into motion at...
6265976 Method and apparatus for providing receiver dual channel coupling in a reader for RFID tags  
The invention reduces recovery time in a receiving coil or antenna of an RFID reader by generating a reference voltage that then clamps the node on which the desired signal is monitored. The coil...