Patents by Inventor Frederick N. Spiess

Frederick N. Spiess 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).

  • Precision transponder and method of communicating therewith
    Patent number: 4214314
    Abstract: A method of communicating with a remote precision transponder includes the step of transmitting first signals to the transponder. The first signals are received in the transponder, and second signals representative of the first signal are delayed therein for a precise time interval. After the precise time interval, third signals representative of the delayed second signals are transmitted from the transponder. Detailed embodiments of a transponder for performing these steps are also disclosed.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: July 22, 1980
    Assignee: Regents of the University of California
    Inventors: Frederick N. Spiess, Dwight E. Boegeman, Frank V. Pavlicek, Carl D. Lowenstein