Patents by Inventor Gregory A. Marek

Gregory A. Marek 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 reducing residual RF power in a transmitter/receiver antenna
    Patent number: 5365235
    Abstract: A method and apparatus for interrogating a transponder using a single transmitter-receiver antenna transmits an interrogation signal to the transponder. The transmit signal has two segments; a first segment for energizing the transmitter-receiver antenna and a second segment having a second phase for cancelling energy in the transmitter-receiver antenna. The amount of energy is reduced before the transponder transmits a response signal.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: November 15, 1994
    Assignee: Ford Motor Company
    Inventors: John F. Kennedy, Lawrence P. Kirk, Gregory A. Marek