Patents by Inventor Ian B. Kerfoot

Ian B. 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
  • Method and system for synthetic aperture sonar
    Patent number: 7242638
    Abstract: A method and system for synthetic aperture sonar provide improved position estimates of a receive array as in moves through a body of water.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: July 10, 2007
    Assignee: Raytheon Company
    Inventors: Ian B. Kerfoot, James G. Kosalos
  • Method and system for synthetic aperture sonar
    Patent number: 7133326
    Abstract: A method and system for synthetic aperture sonar provide improved position estimates of a receive array as in moves through a body of water.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: November 7, 2006
    Assignee: Raytheon Company
    Inventors: Ian B. Kerfoot, James G. Kosalos
  • Method and system for synthetic aperture sonar
    Patent number: 7046582
    Abstract: A method and system for synthetic aperture sonar provide improved position estimates of a receive array as in moves through a body of water.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: May 16, 2006
    Assignee: Raytheon Company
    Inventors: James G. Kosalos, Ian B. Kerfoot