Patents by Inventor Junichi Kozu

Junichi Kozu 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).

  • Magnetic recording medium, method of producing the same, and recording and reading-out method
    Patent number: 6217970
    Abstract: The disclosure describes a magnetic recording medium having at least a magnetic layer, optionally by means of an under layer, on a non-magnetic substrate, wherein projections formed by irradiation of an energy beam and each having a height from 1 to 60 nm are provided at the number of 102 to 108 per 1 mm2 on the surface of any one of the non-magnetic substrate, the under layer, the magnetic layer and the magnetic recording medium.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: April 17, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoji Arita, Yuzo Seo, Ryuichi Yoshiyama, Junichi Kozu, Toshihiko Kuriyama, Mitsunori Mochida
  • Magnetic recording medium, method of producing the same, and recording and reading-out method
    Patent number: 5928759
    Abstract: The disclosure describes a magnetic recording medium having at least a magnetic layer, optionally by means of an under layer, on a non-magnetic substrate, wherein projections formed by irradiation of an energy beam and each having a height from 1 to 60 nm are provided at the number of 10.sup.2 to 10.sup.8 per 1 mm.sup.2 on the surface of any one of the non-magnetic substrate, the under layer, the magnetic layer and the magnetic recording medium.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: July 27, 1999
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yoji Arita, Yuzo Seo, Ryuichi Yoshiyama, Junichi Kozu, Toshihiko Kuriyama, Mitsunori Mochida