Patents by Inventor Roger N. Priestley

Roger N. Priestley 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).

  • Collision warning system
    Patent number: 5252978
    Abstract: A collision warning signal for at least one vehicle is provided by transmitting from the surface of the earth a radio signal, receiving at the surface of the earth, a radio signal returned by a vehicle in response to the transmitted radio signal, determining an elapsed time between the transmitting of the radio signal and the receiving of the corresponding returned radio signal, determining the position of the vehicle at least in part in dependence upon the determined elapsed time, comparing the determined position of the vehicle with terrain data stored in a data base, and generating a warning signal based on the comparison if predetermined parameters are satisfied.
    Type: Grant
    Filed: July 16, 1992
    Date of Patent: October 12, 1993
    Assignee: GEC Ferranti Defence Systems Limited
    Inventor: Roger N. Priestley