Patents by Inventor Kiyoshi Kishiki

Kiyoshi Kishiki 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).

  • Cathode for magnetron
    Patent number: 6420821
    Abstract: A cathode for a magnetron having concave/convex portions on a surface of a cylindrical base metal with thermionic emitting materials being fixedly attached to concave portions from among the concave/convex portions. The convex portions of the concave/convex portions are arranged to be inclining. It is enabled to effectively protect thermionic emitting materials from inverse impulse of electrons or ions and from oscillation to thereby restrain consumption and omission of these thermionic emitting materials and to decrease higher harmonics of radiation.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: July 16, 2002
    Assignee: New Japan Radio Co., LTD
    Inventors: Kiyoshi Kishiki, Yukio Torikai, Toshihiko Yamashita, Hideyuki Obata