Patents by Inventor Katsunobu Kiriyama

Katsunobu Kiriyama 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).

  • Permanent magnet member and method of producing same
    Patent number: 5649362
    Abstract: A permanent magnet member composed of an integral sintered body made of a ferrite magnet material, the integral sintered body including a cylindrical center portion and shaft portions formed at the opposite ends of the cylindrical center portion and each having a smaller diameter than that of the cylindrical center portion, the cylindrical center portion being provided with a plurality of magnetic poles extending axially and arranged circumferentially on an outer surface of the cylindrical center portion.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: July 22, 1997
    Assignees: Hitachi Metals, Ltd., Gunma Electronics, Ltd.
    Inventors: Mikio Yamamoto, Keitaro Yamashita, Katsunobu Kiriyama
  • Permanent magnet member and method of producing same
    Patent number: 5488341
    Abstract: A permanent magnet member composed of an integral sintered body made of a ferrite magnet material, the integral sintered body including a cylindrical center portion and shaft portions formed at the opposite ends of the cylindrical center portion and each having a smaller diameter than that of the cylindrical center portion, the cylindrical center portion being provided with a plurality of magnetic poles extending axially and arranged circumferentially on an outer surface of the cylindrical center portion.
    Type: Grant
    Filed: June 6, 1994
    Date of Patent: January 30, 1996
    Assignee: Hitachi Metals, Ltd.
    Inventors: Mikio Yamamoto, Keitaro Yamashita, Katsunobu Kiriyama