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| Number | Title | Issue Date |
| 8115603 | Method for identifying multiple moving tags with multiple readers Disclosed is a method for identifying a plurality of moving tags by using a plurality of Radio Frequency Identification (RFID) readers. The technology of the present invention efficiently identifies multiple moving tags to thereby improve the identification rate and... | 02/14/2012 |
| 7880589 | Communications device identification methods, communications methods, wireless communications readers, wireless communications systems, and articles of manufacture Communications device identification methods, communications methods, wireless communications readers, wireless communications systems, and articles of manufacture are described. In one aspect, a communications device identification method includes providing identif... | 02/01/2011 |
| 7868738 | Device simulator framework for an RFID infrastructure The claimed subject matter provides a system and/or a method that facilitates simulating one or more devices respective to disparate vendors, wherein the devices can be associated with an RFID infrastructure. A physical device can wirelessly receive data from a tag.... | 01/11/2011 |
| 7864027 | Electronic tag system, communication apparatus, and electronic tag A disclosed system includes electronic tags and a communication apparatus that communicates with the electronic tags and includes management information to manage the electronic tags. In the disclosed system, each of the electronic tags contains an ID a part of whic... | 01/04/2011 |
| 7737822 | Method of recognizing whether a transponder belongs to a group of transponders A method recognizes whether a transponder designed for communicating with a communication station belongs to one of at least two groups of transponders. First, for each group of transponders, a check data block that is significant for the group of transponders is ge... | 06/15/2010 |
| 7737823 | Method for efficiently querying and identifying multiple items on a communication channel Systems and methods for efficiently querying and identifying multiple items on a communication channel are disclosed. The inventions preferably uses radio frequency identification with interrogation devices and systems that identify radio frequency identification tr... | 06/15/2010 |
| 7573369 | System and method for interrogating and locating a transponder relative to a zone-of-interest A directional warning system and a method of warning of friendly forces. In one embodiment, the system includes: (1) a conductive shield having an opening at an end thereof and a radio frequency absorptive material located on an inner surface thereof, (2) a Luneberg... | 08/11/2009 |
| 7425888 | Methods for optimizing communications between an RFID reader and a tag population using non-sequential masking System and methods for optimizing communications between an RFID reader and a population of tags are described. To minimize the amount of data exchanges, the reader and tags use non-sequential bit string or byte masking. In non-sequential bit string masking, the rea... | 09/16/2008 |
| 7423527 | Radio frequency identification (RFID) network system and method A bidirectional radio frequency identification (RFID) network system and method are presented. The system allows users to configure, monitor, and manage different sensor devices by using a graphical user interface real-time. The reconfiguration is done through a net... | 09/09/2008 |
| 7414517 | Radio frequency identification transponder A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memo... | 08/19/2008 |
| 7348886 | System and method to track inventory using RFID tags System and method for tracking inventory of a multiplicity of products. First RFID tags are associated with respective products or groups of products. Second Active RFID tags are associated with respective first containers for the multiplicity products. A third Acti... | 03/25/2008 |
| 7336152 | Method and system for tracking clustered items A method and system for tracking each item in a cluster of items. Each item has an associated item ID. The method and system involve the following steps. Storing a plurality of item records. The plurality of item records includes, for each item in the cluster of ite... | 02/26/2008 |
| 7336155 | Remote control device for a motor vehicle A remote control for a garage door opener includes a transmitter for transmitting electromagnetic signals and at least one manual actuator. The transmitter can be arranged in flexible mounting areas inside or outside the motor vehicle and can be spatially separate f... | 02/26/2008 |
| 7336163 | Transponder startup control method and interrogator for tire pressure monitoring system A passive transponder is started up by receiving an interrogation signal and returning a requested response signal. The startup is controlled by an interrogator using a startup control method by judging presence or absence of a return of the response signal while mo... | 02/26/2008 |
| 7336179 | Information processing system using IC tags There is disclosed an information processing system having plural IC tags (e.g. RFID tags), each of which transmits back a signal in response to an interrogatory signal sent from a cell phone acting as an interrogator. The information processing system includes the ... | 02/26/2008 |
| 7336932 | Narrow band communication vehicle-mounted apparatus The present invention provides a narrow band communication vehicle-mounted apparatus capable of performing communication in which there are normally no discrepancies with on-road systems when the apparatus starts up. The narrow band communication vehicle-mounted app... | 02/26/2008 |
| 7327257 | RFID tag with modifiable and reversible read range According to some embodiments, read range control update information is received in a radio frequency (RF) signal. The information is used to control a read range of an antenna. The read range of the antenna can be increased or deceased, for example, by changing an ... | 02/05/2008 |
| 7324040 | Method of automatically setting the gain of an interrogator receiver within a non-contacting identification system An attack is activated in a receiver amplifier of an interrogator whenever an amplified input signal exceeds an attack threshold voltage value Vatt, and the receiver amplifier at least during a waiting period, the length of which preferrably equals the double length... | 01/29/2008 |
| 7319393 | RFID tags for enabling batch reading of stacks of cartons A radio-frequency identification (RFID) system including an RFID tag and an RFID-enabled object. The RFID tag may include first and second antennas and an RFID circuit. The antennas receive activation energy from a reader. The tag may also include a transmission lin... | 01/15/2008 |
| 7319879 | Method and apparatus for providing dispatch-type services in a cellular communication system An interconnect communication system is provided that provides for dispatch-type services including Instant Access call set up, talkgroup creation and management, and in-band floor arbitration and mode switching that employ in-band signaling tones. By providing talk... | 01/15/2008 |
| 7315274 | Method and system for determining the position of marine vessels and similar objects A method for determining the relative position between two or more objects in a marine environment, including waterways, of which at least one object can be maneuvered relative to one or more other objects. At least one interrogator is arranged on one or more of the... | 01/01/2008 |
| 7298243 | Radio frequency identification system with privacy policy implementation based on device classification Methods and apparatus are disclosed for use in an RFID system comprising a plurality of RFID devices and at least one reader which communicates with one or more of the devices. In accordance with an aspect of the invention, identifiers transmitted by the RFID device... | 11/20/2007 |
| 7287425 | Ultrasonic fuel level monitoring device The invention describes a method of altering the transmitted frequency used in an ultrasonic ranging system for liquid level measurement in a fuel tank. The frequency agility of the system is an important component of performing liquid level measurement in an enclos... | 10/30/2007 |
| 7289015 | Method for efficiently querying and identifying multiple items on a communication channel A method for identifying objects using an interrogation device on a communication channel is disclosed. Each object has an identification number in the form of a plurality of digits and has the ability to communicate to the interrogating device at least two differen... | 10/30/2007 |
| 7274285 | System and method for improved object identification A method for identifying objects within a set of objects includes the steps of transmitting a signal toward a region of interest, receiving energy reflected from the region of interest, establishing a baseline field strength for the received reflected energy, determ... | 09/25/2007 |
| 7274294 | Mobile locator system and method A locator system includes a handheld unit for providing an interrogation signal. The handheld unit can be a handheld computer or PDA including an RF module. The interrogation signal is received by an RF tag. The RF tag can include a power source and a memory. The me... | 09/25/2007 |
| 7267266 | Security system In accordance with the present invention, an apparatus is provided wherein a device is disabled if the device is located more then a predetermined distance away from the owner. Accordingly, a lost or stolen device is rendered unusable. The device has coupled thereto... | 09/11/2007 |
| 7263330 | Validation of the presence of an electromagnetic transponder in the field of a phase demodulation reader A terminal for generating an electromagnetic field adapted to communicating with at least one transponder, and a method for controlling such a terminal including: an oscillating circuit adapted to being excited by a remote supply signal of the transponder; a phase d... | 08/28/2007 |
| 7262686 | Methods and apparatuses to identify devices A reader identifies tags without requiring or determining whether a response to an interrogation was a single response from a single tag or multiple responses from multiple tags. A method is performed by a tag in an identification system, and the method includes rec... | 08/28/2007 |
| 7259654 | Radio frequency identification transponder A radio frequency identification transponder includes a power supply and a dynamic memory array that stores data. When power from the power supply ceases, the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic memo... | 08/21/2007 |
| 7253717 | Method and system for communicating with and tracking RFID transponders An RFID system and method for communicating between a host computer, one or more interrogators connected to the host computer, and a large body of transponders distributed within an area covered by the interrogators. Each transponder originally has a common identifi... | 08/07/2007 |
| 7250864 | Reading/writing apparatus of tag unit A tag unit comprises two RFID tags arranged nearly parallel with each other, each RFID tag including an antenna, tag transmission/reception section, and storage section. The tag unit stores different serial numbers in the respective storage sections. A tag unit read... | 07/31/2007 |
| 7248145 | Radio frequency identification transponder A radio frequency identification transponder including a power supply and a dynamic memory array which stores data. When power from the power supply ceases the data in the dynamic memory array is validly maintained for a predetermined period of time. The dynamic mem... | 07/24/2007 |
| 7246237 | Method and device for the generation of several channels in an IFF type system A method of interrogation/response in an IFF type Mode 5 communications system comprises at least the following steps: modulating the header of an interrogation message by using an orthogonal or substantially orthogonal function; detecting the modulation function us... | 07/17/2007 |
| 7245220 | Radio frequency identification (RFID) controller A radio frequency identification (RFID) controller within an RFID system includes an RFID interrogator interface configured to receive signals from an RFID interrogator. The RFID interrogator receives data from RFID tags. The RFID controller also includes a user int... | 07/17/2007 |
| 7243855 | Contactless identification tag, data communication system and contactless identification tag control program A data communication system includes a host device, a reader/writer device and a plurality of contactless identification tags. The contactless identification tag includes a data reception section, a data transmission section, a data control section, a data storage s... | 07/17/2007 |
| 7245059 | Method of exciting a piezoelectric crystal The invention describes the use of an electrical pulse that is a single square wave to excite a piezoelectric crystal. This pulse is applied alternately to either side of the crystal at twice the nominal resonant frequency of the crystal. This method provides a sign... | 07/17/2007 |
| 7239229 | Efficient protocol for reading RFID tags An RFID tag has an N data element tag identifier that uniquely identifies the RFID tag. The RFID tag selects M data elements of the tag identifier, where M | 07/03/2007 |
| 7232068 | Non-contact IC card reader/writer device, non-contact IC card, input device, and method of calculating location of non-contact IC card A non-contact IC card reader/writer device includes antennas that perform carrier wave transmission and reception with a non-contact IC card, an A/D converter that detects the voltage level of each carrier wave received from the non-contact IC card through the anten... | 06/19/2007 |
| 7231028 | Method and system for the management of subscriber functions The present invention relates to a method and system for the management of subscriber functions in a digital telephone exchange. According to the invention, the functions for default subscribers are stored in and read from default records common to the subscribers, ... | 06/12/2007 |
