Patents Assigned to Gunma Electronics, Ltd.
  • 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