Patents by Inventor Chester D. Loggins, Jr.

Chester D. Loggins, Jr. 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).

  • Multiple frequency synthetic aperture sonar
    Patent number: 4953143
    Abstract: A dual frequency, synthetic aperture, sonar system includes a transmitter r projecting insonifying pings alternatively at first and second frequencies and a linear receiving array carried by a vehicle so as to receive returns from said pings. The first and second frequency returns are separated and subjected to processing in parallel channels where they are resolved into in-phase and quadrature components for subsequent phase-error correction, coherent addition, and synthetic aperture beamforming.
    Type: Grant
    Filed: January 12, 1981
    Date of Patent: August 28, 1990
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Francis J. Higgins, Chester D. Loggins, Jr., James T. Christoff