Patents by Inventor Mary Kerfoot

Mary Kerfoot 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).

  • Systems and methods for detection and analysis of amplitude modulation of underwater sound
    Patent number: 7773458
    Abstract: Systems and methods for detection and analysis of amplitude modulation of underwater sound employ a product of a time delayed first electrical signal with a second electrical signal to generate a summed-product signal. The time delayed first electrical signal and the second electrical signal have an amplitude modulation indicative of characteristics of a vessel propeller. The summed-product signal is analyzed to detect a vessel and to determine the characteristics of the vessel propeller. In some arrangements a plurality of summed-product signals are analyzed to also determine a depth of the detected vessel.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: August 10, 2010
    Assignee: Raytheon Company
    Inventors: Arnold W. Novick, Michael F. Janik, Ian B. Kerfoot, Mary Kerfoot, legal representative
  • SYSTEMS AND METHODS FOR DETECTION AND ANALYSIS OF AMPLITUDE MODULATION OF UNDERWATER SOUND
    Publication number: 20090122649
    Abstract: Systems and methods for detection and analysis of amplitude modulation of underwater sound employ a product of a time delayed first electrical signal with a second electrical signal to generate a summed-product signal. The time delayed first electrical signal and the second electrical signal have an amplitude modulation indicative of characteristics of a vessel propeller. The summed-product signal is analyzed to detect a vessel and to determine the characteristics of the vessel propeller. In some arrangements a plurality of summed-product signals are analyzed to also determine a depth of the detected vessel.
    Type: Application
    Filed: February 29, 2008
    Publication date: May 14, 2009
    Inventors: Arnold W. Novick, Michael F. Janik, Ian B. Kerfoot, Mary Kerfoot