Patents by Inventor Richard D. Eaton

Richard D. Eaton 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).

  • Phase shift analysis for vehicle intrusion detection
    Patent number: 5396217
    Abstract: Intrusion into an automotive vehicle interior is detected by passing an airborne acoustic signal through a portion of the vehicle interior when the vehicle security system is active, and by measuring any change in phase in the signal as it passes through the vehicle. The phase of a first frequency component in the signal is sensitive to intrusion into the vehicle, and the phase of a second frequency component is sensitive to false alarm conditions, but is not sensitive to intrusion.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: March 7, 1995
    Assignee: General Motors Corporation
    Inventors: David T. Proefke, Richard D. Eaton, Frank B. Wiloch, John R. Bolhuis