|
Match
|
Document |
Document Title |
|
|
6072421 |
Moving object high-accuracy position locating method and system
In an automated roadway system having transponders or data-stations spaced at known positions along the roadway, a vehicle mounted system determines the position of a vehicle moving along the...
|
|
|
6067039 |
Systems and methods for determining the distance between two locations
A distancing system comprising radio frequency transceivers and data processing circuits. The radio frequency transceivers allow data transmission via a high frequency radio signal. The...
|
|
|
6064320 |
Automatic vehicle identification system capable of vehicle lane discrimination
A system of vehicle identification with a first interrogator that uses a Lower SideBand (LSB) receiver to receive a modulated signal from a vehicle transponder and a second interrogator that uses...
|
|
|
6052065 |
Vin reading and transmitting system
A new VIN Reading and Transmitting System for providing a device for automatically detecting a vehicle identification number and transmitting the number to a dispatch station for immediate...
|
|
|
6046683 |
Modulated backscatter location system
A radio communications system is that can determine the location of an RFID Tag. The radio communication system includes at least one Interrogator for generating and transmitting a modulated radio...
|
|
|
6043755 |
Systems and methods employing a plurality of signal amplitudes to record the presence of multiple objects
A system and method for identifying objects. A preferred embodiment employs a radio transceiver on each object. Each article is identified by recording an amplitude at which the respective...
|
|
|
6028503 |
Contactless data transmission and receiving device with a synchronous demodulator
A transmission and receiving device for contact data transmission between the device and a transponder. The transmission and receiving device has an antenna resonant circuit, a synchronous...
|
|
|
6008750 |
Microwave transceiver utilizing a microstrip antenna
A transceiver module for use in a police traffic surveillance radar system is provided which is of a smaller size and of a lighter weight than those traditionally available. The transceiver module...
|
|
|
5995019 |
Method for communicating with RF transponders
A method of selecting groups of radio frequency RF transponders (tags) for communication between a base station and the tags. The tags are selected into groups according to a physical attribute of...
|
|
|
5981166 |
Screening of soluble chemical compounds for their pharmacological properties utilizing transponders
The invention provides a method to rapidly screen chemical compounds by delivering the compounds to the assay as a coating on transponders, rather than as powder or solution. The transponder's...
|
|
|
5970148 |
Low cost encryption transponder
Novel means of achieving increased security while still obtaining a low cost, manufacturable device are disclosed and claimed. The first mode of operation is the learn mode which provides means for...
|
|
|
5970393 |
Integrated micro-strip antenna apparatus and a system utilizing the same for wireless communications for sensing and actuation purposes
A system utilizing a number of micro-strip antenna apparatus embedded in or mounted on the surface of a structure for enabling wireless communication of sensed and actuation signals. The...
|
|
|
5963149 |
Movable body communication system
A response unit located on a vehicle performs transmission operations for transmitting signals including a pilot response signal responsive to receipt of a pilot signal from a fixed transceiver....
|
|
|
5959568 |
Measuring distance
An object in a storage area or moving vehicle is monitored by attaching an electronic tag to the object. An electronic device detects the presence of the object by communicating with the tag while...
|
|
|
5955949 |
Layered structure for a transponder tag
A transponder antenna is carried by a substrate and is sandwiched between the substrate and a cover sheet. A rectangular opening extends through the cover sheet and receives a signal processing...
|
|
|
5952935 |
Programmable channel search reader
An interrogator for use with a plurality of identification systems using different frequencies and different methods of demodulation and decoding is provided. Each of the identification systems...
|
|
|
5945938 |
RF identification transponder
An RF identification transponder comprises a substrate layer, and an array of M*N antenna elements formed on the substrate layer, where M and N are integers. The antenna elements have a common...
|
|
|
5936540 |
Process for the management of concurrent access and device for practicing the same
Process for managing concurrent access permitting the successive input or storage of several slave devices (receiver/transmitter) in the field of action of a master device (emitter/reader) so as to...
|
|
|
5929801 |
Method for repeating interrogations until failing to receive unintelligible responses to identify plurality of transponders by an interrogator
A novel addressing scheme for an RF-ID system or LAN network is presented in which an interrogator(reader) addresses a set of transponders, each transponder in this set having a common addressing...
|
|
|
5929780 |
Method of monitoring and programming a plurality of transponders simultaneously, and apparatus for implementing the method
A method and apparatus for simultaneously storing a set of read/write or respond-to-order transponders located in a container. The method transmits radiation to read/write trnsponders to energize...
|
|
|
5891240 |
Radio frequency automatic identification system
A radio frequency automatic identification system detects targets which include solid resonators resonating at several frequencies, attributing information to the frequencies at which the target...
|
|
|
5864580 |
Miniature wireless modem
A wireless modem employs a radio frequency (RF) transponder system components to remotely access the memory of an electrical or electro-mechanical device by providing an exciter/reader/writer (ERW)...
|
|
|
5862456 |
Vehicle device for data transmission to a stationary beacon, and resultant communication system
A device of a vehicle for data transmission to a stationary beacon 91), which has a transceiver, comprising an on-board unit (2) with an antenna (6) for receiving a continuous signal (5), broadcast...
|
|
|
5841364 |
Method and apparatus for transfering information from a transponder
A transponder unit (10) includes an N cycle counter (30) and an M cycle counter (28). The N cycle counter (30) has a different cycle value than the M cycle counter (28). During the transmission of...
|
|
|
5821895 |
Method and device for locating and identifying objects by means of an encoded transponder
A method and device for locating and identifying objects uses an encoding transponder in combination with the use of an SAR device carried in aircraft and spacecraft. Signals transmitted by the SAR...
|
|
|
5822714 |
Data processing system and method for accessing a plurality of radio frequency identification tags
A data processing system and method are implemented for determining when a portion of RFID tags in a read volume cannot be fully accessed by a RFID tag reader. In the data processing system,...
|
|
|
5809142 |
Method and system for calculating a user account balance in a recognition system
A system and method in which a transponder (14) is operable to transmit an original user account balance to an interrogator (12), which in turn calculates a revised user account balance and...
|
|
|
5805105 |
Radio range finder
A radio range finding system includes a radio range finder and a plurality of remote mobile transponders. The radio range finder transmits a signal modulated with an address code identifying a...
|
|
|
5792337 |
Method and apparatus for detection of corrosion
A method and apparatus for sensing corrosion are provided in which an interrogation unit (14) transmits interrogation pulses and receives responses. A plurality of corrosion sensors (12) are...
|
|
|
5793324 |
Transponder signal collision avoidance system
Transponder signal collision avoidance system incudes a reader and wireless HDX or FDX type transponders (A, B) are disclosed, interrogated by the reader (R) by alternately powering and then...
|
|
|
5790052 |
Method for determining the position of a vehicle on a road
According to the present invention, a method is proposed for determining the position of a vehicle, in which the vehicle performs a data transmission in the short-range field of at least one...
|
|
|
5786998 |
Apparatus and method for tracking reporting and recording equipment inventory on a locomotive
An apparatus for tracking reporting and recording equipment inventory on a locomotive equipped with a mobile communications package (MCP) operatively connected to on-board intelligent devices and...
|
|
|
5784023 |
Speed detection method
An improved remote speed sensing technique is described which improves performance reliability by increasing the relative signal to noise ratio of a speed detector compared to that of a vehicle...
|
|
|
5781106 |
Device and method for the telecontrol of an object
A vehicle (V) is fitted with a primary receiver/emitter cell (1) containing a first code (C1) and a secondary receiver/emitter cell (2) containing a second code (C2) as well as a first...
|
|
|
5777561 |
Method of grouping RF transponders
A method of selecting groups of radio frequency RF transponders (tags) for communication between a base station and the tags. The tags are selected into groups according to a physical attribute...
|
|
|
5774045 |
Arrangement for detecting objects in a region to be monitored
A transmitter/receiver unit and a reflector unit are installed at opposite ends of a region to be monitored. The reflector unit consists of a receiving antenna whose signal is sent to a surface...
|
|
|
5764156 |
Transponder detector
The transponder detector has an antenna for radiating a power signal to an identification transponder of an unidentified type and for reading a response signal characteristic from the transponder....
|
|
|
5751570 |
Method of automatically identifying an unknown number of transponders with a reader and identification system for executing the method
In a method for automatically identifying an unknown number of transponders, these transponders are put into a dead state by a collision signal transmitted by the reader. Then, each transponder...
|
|
|
5748137 |
Wireless flywheel synchronization method
The invention is an improved method and apparatus for synchronizing wireless communications utilizing a master source (10) for a transmitting a synchronizing pulse to multiple reader modules (20...
|
|
|
5745049 |
Wireless equipment diagnosis system
A wireless equipment diagnosis system which can perform inspection and maintenance precisely and accurately, and which comprises sensors which measure information on each equipment being diagnosed,...
|
|
|
5740046 |
Method to control in a track traffic system moving units, device for effecting of such control and process for installation of the device
Method and device for control within a line network such as a tram line, of a number of rolling units in various line runnings, and a method for installation of said device. A number of passive...
|
|
|
5724028 |
RF remote system with drive-away prevention
A drive-away prevention security system used in connection with an RF remote keyless entry system. A microprocessor and associated circuitry are configured within the head of an ignition key for a...
|
|
|
5721535 |
Tag responsive to high frequency for varying capacitance of capacitor in power source
The outputted voltage of a rectifier 3 is detected by a voltage detector circuit 17. When the detected voltage value is low (received radio wave is weak, distance is long), a controller 20 turns...
|
|
|
5712628 |
Digitally programmable radio modules for transponder systems
A programmable digital radio is configured to perform transponder functions. A receiver in the programmable digital radio receives analog signals from an interrogator and digitizes the analog...
|
|
|
5712630 |
High power moving object identification system
A moving object identification system with a novel coding scheme achieves 75% transmission efficiency. With this system, a transmittable range is expanded. Logical value assignment for residual...
|
|
|
5710556 |
Device for locating a moving body having a response unit
A device for locating a moving body includes: an interrogation unit (10) for communicating with a response unit (50) mounted on a vehicle (51) present in a lane of a communication zone "a";...
|
|
|
5703574 |
Method and device for transferring a measurement signal from a revolving roll used in a paper making machine
A method and device for transferring a measurement signal from a revolving roll used in a paper making machine, in which detectors are arranged in the transverse direction of the roll, preferably...
|
|
|
5686920 |
Transponder maintenance mode method
A method and system is provided for communicating permanent or semi-permanent information to a transponder (14) from an interrogator (12), preferably operated by a toll agency or other authorized...
|
|
|
5671786 |
Apparatus for automatic refueling of vehicles
Apparatus for the automatic fuelling of vehicles. A robot head that carries a fuel filler tube is movable to enable it to be brought into position to engage with a vehicle fuel-tank pipe. The robot...
|
|
|
5648767 |
Transponder detection system and method
A transponder detection system for detecting the presence at a detection area of a vehicle on which the transponder is mounted. Two antenna arrays are located on opposite sides of the detection...
|