Patents by Inventor John D. Roths

John D. Roths 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).

  • Method and apparatus for global positioning system based cooperative location system
    Patent number: 6043777
    Abstract: A cooperative location system for use with a Global Positioning System ("GPS"). The system includes a beacon that receives GPS signals and transmits GPS data representing the location of the beacon to a remote locator. The locator receives the beacon's GPS data from the beacon. Based on the beacon's GPS data, a reference direction provided by a compass, and the locator's own GPS data, the locator calculates range and direction information to the beacon.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: March 28, 2000
    Assignee: Raytheon Aircraft Company
    Inventors: Julian J. Bergman, Scott W. Kennett, John D. Roths, Karl L. Thorup