Patents by Inventor Kikoyuki Masuzawa

Kikoyuki Masuzawa 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).

  • Oxide magnetic material, ferrite particle, sintered magnet, bonded magnet, magnetic recording medium and motor
    Patent number: 6139766
    Abstract: The invention aims to provide a ferrite magnet having a high remanence and a high coercivity which are unachievable with prior art hexagonal ferrite magnets, by realizing a hexagonal ferrite whose saturation magnetization and magnetic anisotropy are both high; a ferrite magnet having a high remanence and a high coercivity as well as significantly improved temperature properties of coercivity and experiencing a minimized drop of coercivity even in a low temperature range; a ferrite magnet having a high remanence and a high coercivity using relatively coarse ferrite particles with a particle diameter in excess of 1 .mu.m; and a magnetic recording medium having a high remanence and thermal stability.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: October 31, 2000
    Assignee: TDK Corporation
    Inventors: Hitoshi Taguchi, Kazumasa Iida, Kikoyuki Masuzawa, Yoshihiko Minachi