Patents by Inventor Hirotomo Ogihara

Hirotomo Ogihara 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).

  • Abrasion-resistive high permeability magnetic alloy
    Patent number: 4298381
    Abstract: Abrasion-resistive, high permeability magnetic alloy consisting essentially of 6-9 wt. % of Si, 7-11 wt. % of Al, 2-5 wt. % of Cr, 0.05-2 wt. % of Ti, 0.02-0.3 wt. % of at least one member selected from P and C, and the balance of Fe. The alloy is suitable as a core material for a magnetic head.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: November 3, 1981
    Assignee: Hitachi Denshi Kabushiki Kaisha
    Inventors: Mitsuhiro Kudo, Shigekazu Otomo, Hirotomo Ogihara, Yoshio Aoki