Patents by Inventor Thomas Reisinger

Thomas Reisinger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for protecting a transmission path between a base unit and a mobile key unit
    Publication number: 20020027500
    Abstract: The invention relates to a method and apparatus for protecting a transmission path between a base unit and a mobile key unit in an access control system, in particular for motor vehicles. A carrier signal which is modulated with a user signal is transmitted from a transmitting unit to a receiving unit. According to the invention, a separate reference signal, which has a fixed phase angle with respect to the carrier signal, is also transmitted. The phases of the reference signal and of the carrier signal are compared in a test circuit, and an alarm signal is emitted if a phase difference which varies with time is found.
    Type: Application
    Filed: July 3, 2001
    Publication date: March 7, 2002
    Inventor: Thomas Reisinger