Patents by Inventor Kanji Katakami

Kanji Katakami 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).

  • Fluoroescent display panel having indirectly-heated cathode
    Patent number: 4788472
    Abstract: A fluoroescent display panel has at least one indirectly heated cathode which is easy to manufacture, at a low cost. The cathode produces a uniformly lit display across the entire read out. An indirectly heated cathode comprises a metal sleeve having a layer of electron emissive material. A heating wire passes through the metal sleeve. The metal sleeve and the heating wire are electrically isolated from each other by an insulative layer on the heating wire, except at one portion where the metal sleeve and the heating wire are mechanically and electrically connected to each other.
    Type: Grant
    Filed: December 13, 1985
    Date of Patent: November 29, 1988
    Assignee: NEC Corporation
    Inventor: Kanji Katakami