Patents by Inventor Donald M. Rosencrantz

Donald M. Rosencrantz 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).

  • Submarine launched expendable radio navigation buoy system
    Patent number: 6961657
    Abstract: A submarine launched expendable radio navigation system (SSXRN) buoy method and apparatus. According to one embodiment, a method for determining a submarine geographic position using a SSXRN buoy system is disclosed. The method comprising launching a radio navigation-enabled buoy and recording a launch time and DRNS submarine position. The method further comprises recording a buoy breach time and searching for radio navigation RF signals. Then, recording a radio navigation position acquisition time and an initial radio navigation position. Further, recording a subsequent radio navigation position data and a subsequent time. Moreover, determining a DRNS correction factor using a DRNS position error, a buoy drift, radio navigation position data and DRNS position data. In addition, estimating the submarine geographic position using the DRNS correction factor and a DRNS geographic position. In another embodiment, a SSXRN buoy system is disclosed.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: November 1, 2005
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert L. Wernli, Steven J. Cowen, Jimmy L. Held, Gerald R. Mackelburg, Donald M. Rosencrantz, Aaron R. Braun, Gary D. Murphy