| Patent application number | Description | Published |
|---|
| 20080246604 | Wireless interface module - A system and method that allows remote monitoring by satellite of cargo carried on a mobile conveyance. The system and method provide for a wireless information module (WIM) on the conveyance for transmitting and receiving data from a plurality of wireless devices on the conveyance over a short range wireless network. The WIM relays data to a remote monitoring facility via satellite. Other applications of the system and method include, but are not limited to, remotely controlling wireless devices on a conveyance such as door lock sensors and electronic seals, remotely upgrading the software loaded on the devices within the mobile conveyance, and creating an ad-hoc network of multiple WIMs to maintain satellite communication with all WIMs in the network when certain of the WIMs are unable to communicate directly with a satellite. | 10-09-2008 |
| 20090096584 | RFID MUTUAL AUTHENTICATION VERIFICATION SESSION - In a protocol for preserving the privacy of communications between a RFID reader and a RFID tag, two distinct actions are taken. First, the reader and the tag must be mutually authenticated as being authorized participants in the communications. After that process is successfully completed, the authenticity of each authorized participant must be validated prior to each subsequent communication between reader and tag. | 04-16-2009 |
| 20100026465 | RFID VEHICLE TAG WITH MANUALLY ADJUSTABLE DATA FIELDS - An RFID tag for use in a vehicle for use in an electronic toll collecting system. The tag is capable of transmitting data to a tag interrogator indicating the occupancy status of the vehicle. In an embodiment, the tag has a user input and a visual and audible tag status indicator. The user input is used to change the occupancy status of the tag, wherein the occupancy status is a portion of a message sent by radio frequency to the interrogator when the vehicle passes through a toll area. | 02-04-2010 |
| 20100079238 | RFID TAG WITH PIEZOELECTRIC SENSOR FOR POWER AND INPUT DATA - An RFID tag having a non-volatile memory and a piezoelectric sensor. The piezoelectric sensor produces an electrical charge that momentarily supplies electrical power to the RFID tag when subjected to a mechanical force and the electrical power is sufficient to record data in the non-volatile memory. The piezoelectric sensor is affixed to an article such that an attempt to tamper with the article produces sufficient mechanical force on the piezoelectric sensor to record data evidencing the tampering in the non-volatile memory. | 04-01-2010 |
| 20100194542 | RFID TAG WITH INTEGRATED DISABLING AND METHOD OF USE - Systems, tags and methods for disabling transponders used in electronic toll collection or other RFID systems, wherein the transponders include an antenna and RFID circuitry. The transponders can be selectively disabled by positioning (e.g., pivotably moving) a disabling member having a metallic portion to an operative position over the antenna of the RFID system, whereupon the metallic portion is coupled to the antenna in such a manner as to disable the RFID circuitry so long as the disabling member is at the operative position. The RFID circuitry is arranged to be automatically enabled upon removal of the disabling member from the operative position (e.g., pivoting the disabling member back to an inoperative position). | 08-05-2010 |
| 20110102156 | RFID TAG WITH OCCUPANCY STATUS RECALL - An RFID tag for use in a vehicle for use in an electronic toll collecting system. The tag is capable of transmitting data to a tag interrogator indicating the occupancy status of the vehicle. In an embodiment, the tag has a user input and a visual and audible tag status indicator. The user input is used to change the occupancy status of the tag, wherein the occupancy status is a portion of a message sent by radio frequency to the interrogator when the vehicle passes through a toll area. In an embodiment the tag has memory for storage of said tag status and the user input can be used to cause the tag to indicate a stored tag status. In a further embodiment, the tag reverts to a default status after a predetermined period of time | 05-05-2011 |
| 20110116686 | VIDEO TOLLING SYSTEM WITH ERROR CHECKING - An automated toll collection system based on visual recognition of a license plate with a supplemental enhancement to confirm the character recognition of the license plate is disclosed. In an embodiment, a supplemental graphic insignia encodes a check-sum for the license plate characters. The insignia is recorded at the same time as the license plate and the check sum is decoded to confirm the interpretation of the characters on the license plate. Other forms of confirmation devices are also disclosed, including RFID devices. | 05-19-2011 |
| 20110260910 | SYSTEM AND METHOD FOR MICROWAVE RANGING TO A TARGET IN PRESENCE OF CLUTTER AND MULTI-PATH EFFECTS - A system for measuring the range to an RFID tag including situations containing high clutter and multi-path signals is disclosed. The system includes an RFID reader; an RFID tag; and a coordinated pulse radar system. In the system the RFID reader causes the tag to respond to received signals in a first backscatter state at a first time and a second backscatter state at a second time. The pulsed radar system transmits short pulses coordinated by the backscatter state of the RFID tag and the system creates a differential signal comprised of the differences between radar signals obtained during the first and second states of the tag to obtain an uncorrupted measure of a round trip time of flight of said radar pulses between the pulse radar system and the RFID tag. | 10-27-2011 |
| 20110279239 | MULTI-PROTOCOL RFID SYSTEM USING BIT-LOCK OR STEP-LOCK SYNCHRONIZATION - A multi-protocol RFID interrogating system employs a synchronization technique (step-lock) for a backscatter RFID system that allows simultaneous operation of closely spaced interrogators. The multi-protocol RFID interrogating system can communicate with backscatter transponders having different output protocols and with active transponders including: Title 21 compliant RFID backscatter transponders; IT2000 RFID backscatter transponders that provide an extended mode capability beyond Title 21; EGO™ RFID backscatter transponders, SEGO™ RFID backscatter transponders; ATA, ISO, ANSI AAR compliant RFID backscatter transponders; and IAG compliant active technology transponders. The system implements a step-lock operation, whereby adjacent interrogators are synchronized to ensure that all downlinks operate within the same time frame and all uplinks operate within the same time frame, to eliminate downlink on uplink interference. | 11-17-2011 |
