Patents Assigned to Mobile Technics LLC
  • Patent number: 7253717
    Abstract: 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 identification code, and upon initialization by the host computer internally generates a unique identification code based upon an internally generated random number. The host, through the interrogators, reads each of the identification codes associated with each transponder by iteratively transmitting a read identification code command along with a controlled variable. Each transponder compares the received controlled variable to an internally generated random number, and selectively transmits its identification code based upon the outcome of this comparison. After the completion of each read identification code iteration, the host adjusts the controlled variable based upon the responses received in the previous iteration.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: August 7, 2007
    Assignee: Mobile Technics LLC
    Inventors: John T. Armstrong, John D. Richert, John P. Palmer