Patents by Inventor Frederick O. Stahlhut

Frederick O. Stahlhut 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).

  • Precise pulse repetition frequency measuring device and signal sorter
    Patent number: 3940768
    Abstract: An electronic signal processing device comprised of timing and coincident ting means for utilization between one or more conventional radar receivers and a conventional visual display, multi-gun pulse analyzer to enable an electronic intelligence operator to perform precise real time measurement of the pulse repetition interval (PRI) and its counterpart, pulse repetition frequency (PRF), for any one of a group of radar signals in a multi-signal environment.
    Type: Grant
    Filed: January 7, 1969
    Date of Patent: February 24, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Robert C. Olsen, Frederick O. Stahlhut