Patents by Inventor David F. Howell

David F. Howell 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).

  • Field emission devices
    Patent number: 5124664
    Abstract: A klystron device comprises an array of cold-cathode field emission elements arranged to form a distributed amplifier which further comprises a modulation strip line and a catcher strip line. A collector electrode is spaced from the catcher strip line. The device may include a deflector for returning electrons emitted by the elements back to the modulation strip line so that the device acts as an oscillator.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: June 23, 1992
    Assignee: The General Electric Company, p.l.c.
    Inventors: Neil A. Cade, David F. Howell