Patents by Inventor Stephen Peter Waites

Stephen Peter Waites 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).

  • Automatic vehicle guidance systems
    Patent number: 4010409
    Abstract: In a frequency selective steering system for automatic vehicle guidance, a phase locked loop is used to derive from a sum signal containing wanted and unwanted signal frequencies a reference signal equal in phase and frequency to the wanted signal. The reference signal is used to derive from a difference signal also containing wanted and unwanted signal frequencies an error signal dependent on the phase of the wanted signal only. The error signal is used to control the steering of the vehicle.
    Type: Grant
    Filed: July 31, 1973
    Date of Patent: March 1, 1977
    Assignee: EMI Limited
    Inventor: Stephen Peter Waites