Patents by Inventor Stephen J. Ferry

Stephen J. Ferry 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).

  • Near obstacle detection system
    Patent number: 4901083
    Abstract: In a radar system, an RF signal is transmitted at a frequency modulated by a sawtooth signal. The transmitted RF signal is mixed with the transmitted signal reflected from an object. The resulting IF signal is analyzed into a Fourier series having a DC coefficient and harmonic frequency coefficients. The range to the object is determined from the harmonic frequency coefficients in multiples of the range resolution determined by the RF bandwidth of the system when the DC coefficient is less than each of the harmonic frequency coefficients. The range to the object is determined to be within 1/2 the range resolution determined by the RF bandwidth when the DC coefficient is greater than each of the harmonic frequency coefficients.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: February 13, 1990
    Assignees: Delco Electronics Corporation, Santa Barbara Research Center, Hughes Aircraft Company
    Inventors: Phillip A. May, Cheng P. Wen, Douglas L. Dunn, Stephen J. Ferry