Patents by Inventor John B. Cox

John B. Cox 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).

  • Multiple-loop microwave frequency synthesizer using two phase lockloops
    Patent number: 4839603
    Abstract: A multiple-loop microwave frequency synthesizer is provided with an upper and a lower phased-lock loop. The phased-lock loops are mutually connected to a novel sampling mixer and their outputs are connected to an up-converter for providing microwave frequency generated signals. The phased-lock loops are provided with a plurality of programmable frequency dividers connected to a processor controller to provide a wide range of adjustable frequencies up to 20 gigahertz at the output of the frequency synthesizer.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: June 13, 1989
    Assignee: Unisys Corporation
    Inventors: Vaughn L. Mower, Evan A. Deneris, John B. Cox