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7375637 |
Methods and apparatus for reducing power consumption of an active transponder
A transponder apparatus having an identifier associated therewith includes a receiver for receiving an RF signal transmitted by an interrogator, a power source and a processing unit that is...
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7369036 |
Method and system of information exchange between an interrogator device and transponder devices that takes into account the level of ambient noise
A method and apparatus of information exchange between an interrogator device and a plurality of transponder devices are disclosed. Each of the transponder devices is equipped with a different...
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7327263 |
Communications system and method with A/D converter
A communications system includes a radio frequency identification device including an integrated circuit having a single die including a microprocessor, a receiver coupled to the microprocessor,...
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7321296 |
Electronic locating systems
Methods and apparatus are disclosed for location of objects to facilitate retrieval, filing, security, inventory stock-keeping and the like. The methods and apparatus employ a tag element...
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7321290 |
Radio tag and system
Passive tags use two antennas with only limited mutual coupling, one of which receives a power/clock field and the other of which receives a data signal. An area-reading antenna, or two or more...
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7286042 |
Passive communication device and passive access control system
A communication device comprising an internal power source, first and second receiver elements for receiving signals transmitted from the base station, and a processor selectively responsive to a...
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7236742 |
System and method for wireless data transfer for a mobile unit
A mobile communication device is provided for wirelessly transferring information to and from a base unit. The device comprises an RFID module to receive a wake-up communication from the base unit...
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7209030 |
Noise alarm timer function for three-axis low frequency transponder
A remote keyless entry (RKE) transponder has a noise alarm timer having a time interval used for determining whether a received signal meets a predefined condition within a time interval. If the...
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7176785 |
Device control system
While a general-purpose interface circuit and another general-purpose interface circuit are provided so as to transmit/receive data between a host appliance and a device appliance, when the...
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7173530 |
Nested visibility for a container hierarchy
A nested container establishes a relative hierarchy of associated containers as logistical units. The relative hierarchy comprises lower-layer containers and upper-layer containers relative to the...
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7161476 |
Electronic tire management system
An electronic tire maintenance system is provided for measuring a parameter of a device at a first location. The system includes a sensor for measuring the device parameter and generating a data...
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7139560 |
Stimulus-dependent electronic device
Herein is disclosed a method, system, and apparatus for dettering theft of portable electronice devices. A portable electronic device is rendered incapable of properly operating after being powered...
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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...
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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 least...
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7089157 |
Measuring device, including at least a sensor, capable of operating in difficult conditions
This invention relates to a measurement device comprising at least one sensor ( 20 ) designed to be installed on a mobile element ( 8 ) free to move with respect to a base ( 14 ), the mobile...
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7079043 |
Radio frequency data communications device
A radio frequency identification device comprises an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active...
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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...
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7046122 |
Receiver circuit
A detector receiver circuit for use as a wake-up detector for detecting an amplitude modulated carrier signal includes an antenna for receiving the modulated carrier signal; and a transistor, such...
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7019617 |
Radio frequency identification devices, backscatter communication device wake-up methods, communication device wake-up methods and a radio frequency identification device wake-up method
Radio frequency identification devices, backscatter communication device wake-up methods, communication device wake-up methods and a radio frequency identification device wake-up method are...
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7009518 |
RFID communication system and the search method thereof
A radio frequency identification (RFID) communication system and the search method thereof are disclosed, which apply search instructions and reads instructions to communicate between a read and a...
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6975224 |
Reusable self contained electronic device providing in-transit cargo visibility
A tracking and security device that is self-contained, portable and easily secured to a shipping container. Since the unit can be easily attached and removed from a container and is relatively...
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6963794 |
Locking system for a motor vehicle
A system for automatic access or driving authorization for a motor vehicle includes a first device in the form of a control device having at least two states for engaging and disengaging vehicle...
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6895226 |
Multimode transceiver circuit
A multimode transceiver circuit comprises a four port coupler of a type which splits a signal applied to one port between two of the other ports. The split signals are phase shifted by a known...
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6879258 |
IC card having a mica film for stable resonance frequency and enhanced antenna properties
An IC card 10 A has a mica capacitor that comprises a mica film 1 and electrodes 6 a, 6 b formed on both sides thereof, where the mica film 1 serves as a mounting substrate for an antenna...
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6831548 |
Data carrier with means for reducing the power consumption upon reception of data
A data carrier ( 1 ), or a circuit ( 2 ) for such a data carrier ( 1 ), which is arranged to receive a carrier signal (CSM) amplitude modulated in conformity with data (DA), is provided with data...
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6816063 |
Radio frequency identification systems and methods for waking up data storage devices for wireless communication
A remote system includes a radio frequency identification (RFID) tag specifically identified by an RF identification signal. The specific RFID tag is associated with a particular remote data...
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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...
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6771169 |
Tire pressure monitoring system with a signal initiator
A tire pressure monitoring system ( 12 ) for a vehicle ( 10 ) has a plurality of tires ( 14 a-d ) in respective rolling locations having a respective plurality of tire transmitters ( 16 a-d ) that...
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6731198 |
Security system, transponder and receiver device
A security system includes a base station and at least one transponder. A data dialogue takes place between the base station and the transponder in which the transponder sends back data to the base...
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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...
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6693511 |
System and method for communicating with dormant radio frequency identification tags
The position of a radio frequency identification (RFID) transponder may be determined with respect to a plurality of stationary sensors located in an array within certain physical areas. Each...
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6661336 |
Enhanced identification system
A method and an identification system us for communicating between a reader and a plurality of transponders. The reader has a transmitter for transmitting a signal and each transponder includes a...
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6650228 |
Method an system for reading a dynamic set of tags bearing distinct ID codes
The invention relates to a method and system for reading a dynamic set of tags present in the electromagnetic field of a polling device, consisting in updating cyclically a list of tags present in...
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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 the...
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6606025 |
Synchronous demodulator
A synchronous demodulator ( 10 ) drives an output antenna ( 21 ) with a push-pull driver circuit ( 13 ). The push-pull driver circuit ( 13 ) includes two transistors connected in a push-pull...
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6593845 |
Active RF tag with wake-up circuit to prolong battery life
An active RF transponder is provided with a wake-up circuit that wakes the RF transponder from a sleep state upon detection of an RF interrogating signal. The active RF transponder includes a...
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6590758 |
Wakeup and safety circuits
A wakeup circuit is disclosed that allows for provision of a circuit completing ground connection in response to actuation of a control for a networked accessory such that a resting system may draw...
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6577228 |
Door handle for vehicle and smart entry system for vehicle using the same
A door handle for a vehicle which can miniaturize a transmitter provided on the vehicle and reduce a cost of the system is provided. The door handle includes a handle body which is mounted on an...
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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 optimum...
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6538563 |
RF transponder identification system and protocol
An RF transponder identification system with an interrogator operable to transmit a plurality of marker signals and a plurality of transponder. Each transponder has a random number associated...
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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 transmits...
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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...
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6396390 |
Device for detecting a key inserted into a motor vehicle lock
A device for detecting a key inserted into a motor vehicle lock includes a transmitter and a receiver connected to a micro-processor and a circuit connected directly between the transmitter and...
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6388569 |
Electronic locating methods
Methods and apparatus are disclosed for location of objects to facilitate retrieval, filing, security, inventory stock-keeping and the like. The methods and apparatus employ a tag element...
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6388562 |
Contactless IC card communication system and related method
A reader/writer (RW) requires identification of anti-collision techniques used by IC cards (A, B, C, and D). The IC cards implement answers to the anti-collision technique identification...
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6354500 |
Method for communicating with a plurality of contactless data carriers and contactless data carrier for use therein
A method of communicating with a plurality of contactless data carriers and a contactless data carrier for use in communicating with a base station. The method of communicating includes the base...
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6329944 |
Tag communication protocol & system
A method of communicating to a RF tag having a low power mode and a scan mode with a radar and an interrogator. The method comprises the steps of alternating the RF tag between the low power mode...
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6323771 |
Method of identifying animals via universal identification scheme
The present disclosure involves a method of identifying animals involving the use of a universal identification scheme capable of identifying individual animals anywhere in the world such that data...
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6271767 |
Inductively coupled underwater modem
The present invention provides a subsurface instrument and a system for the collection and transmission of deep ocean data utilizing standard buoy mooring lines. The system includes a moored...
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6239690 |
Battery economizing in a communications system
For battery economizing in a receiving station (CU) having a radio identity code (RIC) consisting of M bits, a base station (MIU) transmits a wake-up message consisting of at least two repetitions...
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