Patents by Inventor Robert T. Graham, Jr.

Robert T. Graham, 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).

  • Receiver for optical radar
    Patent number: 4077718
    Abstract: A control circuit for maintaining the sensitivity of an avalanche diode at an optimum is shown. Such diode, when used as a photosensitive detector in a receiver in an optical radar, is biased by the disclosed control circuit so that the frequency at which internally generated noise impulses are generated is maintained at a predetermined rate so that echo signals may be distinguished from such impulses.
    Type: Grant
    Filed: March 1, 1976
    Date of Patent: March 7, 1978
    Assignee: Raytheon Company
    Inventors: Robert T. Graham, Jr., Robert M. Stevens, Kenneth F. Kinnard