Patents by Inventor Hideo Koshimoto

Hideo Koshimoto 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).

  • Pressed body of amorphous magnetically soft alloy powder and process for producing same
    Patent number: 6017490
    Abstract: A powder of composite particles is prepared by adhering to the surfaces of particles of an amorphous magnetically soft alloy particles of a glass having a softening point lower than the crystallization temperature of the alloy to coat the surfaces of the alloy particles with the glass. The powder of composite particles prepared is pressed at a temperature higher than the softening point of the glass and lower than the crystallization temperature of the alloy to bond the alloy particles with the glass. The pressed powder body is at least 0.5 in the ratio of the magnetic permeability at 10.sup.7 Hz to the magnetic permeability at 10.sup.4 Hz.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: January 25, 2000
    Assignee: Kubota Corporation
    Inventors: Isamu Otsuka, Isao Endo, Hideo Koshimoto, Hiroshi Yamamoto, Ryosei Okuno
  • Magnetic recording medium of thin metal film type
    Patent number: 5082750
    Abstract: A magnetic recording medium having excellent noise characteristics and comprising a metal magnetic film formed on a nonmagnetic substrate and made of (1) a Co-Cr-Nb alloy, or (2) a Co-Cr-Ni-Nb alloy. The alloys (1) and (2) are represented respectively by the following formulae:Co.sub.1-x-z Cr.sub.x Nb.sub.z (1)Co.sub.1-x-y-z Cr.sub.x Ni.sub.y Nb.sub.z (2)wherein x, y and z each represent an atomic ratio, x is 0.08 to 0.15, y is 0.05 to 0.25 and z is 0.03 to 0.10.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: January 21, 1992
    Assignee: Kubota Ltd.
    Inventors: Toshiaki Morichika, Toshio Tani, Chiaki Sakai, Hideo Koshimoto, Tatsuhiko Kadowaki