Patents by Inventor Michael W. Callahan

Michael W. Callahan 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).

  • Bistatic pulse-overlap Doppler radar intrusion detection apparatus
    Patent number: 4540978
    Abstract: An intrusion detection apparatus utilizing a plurality of bistatic pulse-overlap Doppler radar units to detect target Doppler frequency shifts in an enclosed sensitive volume and utilizing a single RF frequency with different pulse repetition rates to synchronize the bistatic receiver unit with its associated transmitter unit.
    Type: Grant
    Filed: December 7, 1982
    Date of Patent: September 10, 1985
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Bryan L. Burns, Michael W. Callahan