Patents by Inventor Marc Finkelstein

Marc Finkelstein 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).

  • Patent number: 5206654
    Abstract: A passive aircraft monitoring system (20) receives signals transmitted by an instrument landing system (14, 16) and reflected from aircraft (18). The Doppler shift in the reflected signals is used to calculate the position or velocity of the aircraft. Using the ILS 90 and 150 Hz signals reflected from the aircraft and comparing their magnitude, the altitude and lateral position of the aircraft can also be determined.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: April 27, 1993
    Assignee: Hughes Aircraft Company
    Inventors: Marc Finkelstein, Martin J. Geesaman, Thomas J. Lynch