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7215239 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  
In a non-contacting smart card interrogator (1) a first end (A) of an eighth-wave transmission line (13) is connected to a terminal connecting a first receiver (16) to a transmission line (14),...
7201035 Sensor arrangement  
A chemical sensing system has: an interrogation unit operable to wirelessly transmit an interrogation signal and wirelessly receive a response; an environmentally sealed container for holding a...
7196613 System for multi-standard RFID tags  
A reader for a radio frequency identification system capable of simultaneously reading tags operating a multiple frequencies. The reader includes a radio frequency module for each operating...
7196623 Remote reminding system  
The inventive device functions to warn a user of the undesirable condition of an appliance or other equipment. An “undesirable condition” may be an automatic garage door that is left open, a...
7180403 RFID reader utilizing an analog to digital converter for data acquisition and power monitoring functions  
A reader for an RFID system includes an internal power source, a signal generator for generating a detection signal containing analog data and an excitation signal, a transmitting antenna for...
7161469 Reading protocol for transponders of electronic identification system  
A method of reading a plurality of transponders 14.1 to 14.n forming part of an electronic radio frequency identification system 10 comprises the steps of prompting the transponders at 38 to...
7158726 Backbone interface, a terminal interface for communications in a space vehicle, and a communications network comprising such interfaces  
The invention relates to a communications backbone interface between at least three members of a communications network for a space vehicle. In the invention, the interface combines various...
7151436 Receiving/backscattering arrangement and method with two modulation modes for wireless data transmission as well as modulation arrangement therefor  
For transmitting data, a receiving/backscattering arrangement receives, modulates and reflects or backscatters electromagnetic waves emitted by a base station. The modulation corresponds to the...
7145437 Method, terminal and computer program product for adjusting power consumption of a RFID reader associated with a mobile terminal  
The method, terminal and computer program product determine the context of the mobile terminal associated with the RFID reader and adjusts the power consumption of the RFID reader based upon the...
7123148 Wireless communication devices, radio frequency identification devices, radio frequency identification device communication systems, wireless communication methods, and radio frequency identification device communication methods  
The present invention provides radio frequency identification devices, remote communication devices, identification systems, communication methods, and identification methods. A radio frequency...
7119664 Deep sleep in an RFID tag  
Systems and techniques to provide radio frequency identification tags including a non-responsive state, which is independent of supplied power, initiated in conjunction with a tag communications...
7106174 Anti-collision tag apparatus and system  
This invention relates to radio frequency identification (RFID) apparatus comprising a reader/writer and transponders (tags) such that 2 or more transponders are capable of operating...
7098770 Contactless integrated circuit reader  
The present invention relates to a contactless integrated circuit reader operating by inductive coupling, comprising an antenna circuit for sending an alternating magnetic field, circuits for...
7095311 Identification coding schemes for modulated reflectance systems  
An identifying coding apparatus employing modulated reflectance technology involving a base station emitting a RF signal, with a tag, located remotely from the base station, and containing at...
7091828 Interrogators, methods of operating a coherent interrogator, backscatter communication methods, interrogation methods, and signal processing methods  
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...
7088246 RFID tag and method for processing RFID data  
A collision prevention relational function is disclosed for RFID tags, which increases stability during system operations. The RFID tag includes a parallel resonance circuit having a coil, a...
7084769 Intelligent station using multiple RF antennae and inventory control system and method incorporating same  
An inventory control system and method that tracks inventories of items with RFID tags, includes a reader unit and an intelligent station that tracks RFID tags to determine item information of...
7079008 Proximity transaction control method  
Embodiments enable controlling a proximity transaction between first and second communications devices, each of which is provided with a short-range transceiver. In an exemplary embodiment, the...
7075452 Process for reading electronic labels by identifications of their code by block of bits  
The invention concerns a method for reading a set of electronic labels, each comprising a distinct identification code of N bits and situated in the electromagnetic field of an interrogator...
7075436 Method, system, and apparatus for binary traversal of a tag population  
A method, system, and apparatus for interrogating a radio frequency identification (RFID) tag population are described. Tags are interrogated by a reader. The reader and tags engage in...
7075412 Methods and apparatus for operating a radio device  
A radio device such as a wireless tag reader communicates with multiple types of wireless identification tags in a monitored region. The radio device includes a network interface to receive...
7068172 Method and apparatus for deactivating an EAS device  
A deactivator for deactivating label-style EAS devices is claimed. The preferred embodiment, of which, employs a microprocessor unit to control two transceiver coils, and a deactivation coil in...
7057512 RFID reader for a security system  
An RFID reader for use in a security system based upon RFID techniques. The RFID reader can use power line carrier communications to communicate with the controllers in the security system. The...
7053755 Enhanced identification system  
A method and an identification system used for communicating between a reader and a plurality of transponders. The reader has a transmitter for transmitting a signal and each transponder includes...
7049958 Integrated circuit for a transponder  
An integrated circuit is combined with a transponder to function either as a voltage or power supply for the transponder by extracting energy out of an electromagnetic field transmitted by a base...
7042359 Method and apparatus to detect a plurality of security tags  
A method and apparatus to detect a plurality of different security tags are described. A method to detect security tags may include establishing an interrogation zone using at least two signals...
7009495 System and method to identify multiple RFID tags  
An RFID system comprises an RFID reader configured to issue an RF command requesting that RF tags identify themselves, and to issue timing information defining a plurality of timeslots; and a...
7005965 Radio frequency identification device  
The present invention provides a radio frequency identification (RFID) device including a detector and several identification tags. The detector transmits time slot cycle signals, and each of the...
6992568 Passive response communication system  
A method of passive response communication, especially for an access control system, in which a first transponder (2) transmits an interrogation signal to a remote second transponder (3), which...
6992566 Modular school computer system and method  
A local wireless device serves as a unique identifier for students and teachers in a school system. The school is equipped with multiple stationary hubs for tracking the location of students and...
6992567 Electronic label reading system  
An electronic label reading system includes an interrogator including a transmitter and a receiver. The system also has a transmitter antenna connected to the transmitter for generating an...
6983124 Radio frequency-controlled telecommunication device  
Provided are telecommunications devices and systems which incorporate and use radio frequency (RF) tag technology. Telecommunications devices in accordance with one embodiment of the present...
6980086 Method for operating an anti-theft system for a motor vehicle and an anti-theft system  
A method for operating an anti-theft system having a transceiver unit comprising a trigger unit and a portable code generator, comprises the steps of: emitting a request signal by the transceiver...
6960985 Adaptation of the transmission power of an electromagnetic transponder reader  
A terminal for generating an electromagnetic field adapted to cooperating with at least one transponder when the latter enters its field and including an oscillating circuit adapted to receiving a...
6960982 Electronic control unit for variable PWM communication  
An electronic key entry system for vehicles has a security ECU mounted in a vehicle for checking an electronic key via radio communication with the same. The ECU includes a CPU and a PWM output...
6958677 Object location monitoring system  
An object location monitoring system includes beacons that are spatially distributed throughout an area to be monitored. The beacons transmit interrogation signals that are received and echoed by...
6954496 Method for transmitting data from an interrogating device to portable objects  
A method of information transmission from an interrogator system to portable objects. The information is transmitted through ternary amplitude modulation and positional pulse coding. A frame is...
6946951 System and method for interrogating electronic labels  
The invention provides a system and method for interrogating one or more electronic labels attached to objects, the system including an interrogation device capable of radiating an electromagnetic...
6930589 Method and system for tracking items using a distributed infrastructure  
A plurality of items is tracked using a distributed network of gates, each having a gate-identification. Each item is provided with an identifier for specifying an item-identification of the item...
6911899 Method and device for remote identification  
This method of identification between an interrogation system (1) such as an arch and labels (E) placed on objects to be identified and called upon to pass through the interrogation field (2)...
6894624 Passive transponder identification and credit-card type transponder  
A passive transponder identification system and credit card type transponder are disclosed, particularly, the transponder identification system to utilize a transmitting manner of two different RF...
6891475 Low-power passive transponder  
The invention concerns a radio-frequency transponder (12) for contact-free identification with a reader (10), comprising: an antenna (24), an analog circuit (25) including a capacitor (32) an...
6876294 Transponder identification system  
A transponder identification system comprising a plurality of transponders and an interrogation device arranged to identify each of the transponders by transmitting successive interrogation...
6867687 Sideband diversity reader for electronic identification system  
An electronic radio frequency identification system comprises a reader 12 and a plurality of transponders to be read by the reader. The reader comprises a recovery circuit 32 for recovering and...
6836208 Contactless data transmission system and method for contactless data transmission  
A contactless data transmission system having a transponder and a write/read station, between which data can be exchanged by a HF signal. The transponder includes a receiver unit having a...
6828902 Wireless data input to RFID reader  
A wireless data input system has one or more switches on a keypad or the like and a number of individually addressable RFID tags. Each switch operates to enable a corresponding subset of the...
6819223 Transponder system with acknowledgements associated with respective transponders  
During a communication operation in a transponder system, consisting of a write/read station (1) and at least one transponder (2), a selection data block (SDB) is transmitted from the station (1)...
6819221 Method of determining a time value representing at least a part of the communication time interval of a transponder with a communication device  
The disclosure describes a communication device and a transponder adapted to provide contactless communication with the communication device include time-value determiner with the aid of which at...
6819246 Method and apparatus for converting electromagnetic energy of objects  
The invention relates to a method for identifying objects, in which method electromagnetic radiation is imposed on the object (22-25) to be identified. According to the invention, such an...
6799051 Identification system for mobile transceivers  
A method of identifying a target mobile transceiver in a communications network that includes multiple unknown mobile transceivers. In this aspect of the method, a location system interrogates the...