Patents by Inventor Tesshu Miyahara

Tesshu Miyahara 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
    Patent number: 7344073
    Abstract: The present invention discloses a magnetic recording medium comprised by sequentially layering a magnetic recording layer, intermediate layer and concealment layer on a non-magnetic substrate made from a thermoplastic resin, wherein the surface of the intermediate layer forms a single smooth surface with the surface of the non-magnetic substrate as a result of embedding the magnetic recording layer and the intermediate layer within a portion of the non-magnetic substrate, and the concealment layer conceals the surface of the intermediate layer and the surface of the non-magnetic substrate. This magnetic recording medium has superior concealment and adhesion of the concealment layer for the magnetic recording layer as well as a high level of design properties regardless of the type of magnetic particles used in the magnetic recording layer.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: March 18, 2008
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Yoshikazu Yamazaki, Kazunari Kawai, Daisuke Yano, Tesshu Miyahara
  • Magnetic recording medium
    Publication number: 20040089726
    Abstract: The present invention discloses a magnetic recording medium comprised by sequentially layering a magnetic recording layer, intermediate layer and concealment layer on a non-magnetic substrate made from a thermoplastic resin, wherein the surface of the intermediate layer forms a single smooth surface with the surface of the non-magnetic substrate as a result of embedding the magnetic recording layer and the intermediate layer within a portion of the non-magnetic substrate, and the concealment layer conceals the surface of the intermediate layer and the surface of the non-magnetic substrate. This magnetic recording medium has superior concealment and adhesion of the concealment layer for the magnetic recording layer as well as a high level of design properties regardless of the type of magnetic particles used in the magnetic recording layer.
    Type: Application
    Filed: September 26, 2003
    Publication date: May 13, 2004
    Inventors: Yoshikazu Yamazaki, Kazunari Kawai, Daisuke Yano, Tesshu Miyahara
  • Process for producing magnetic metal powder
    Patent number: 4369076
    Abstract: A process for producing a magnetic metal powder having improved oxidation resistance and magnetic properties, which comprises wetting a magnetic metal powder in an atmosphere of a non-oxidizing gas with a solution of a boron trialkoxide in a solvent being inert to the magnetic metal powder and capable of dissolving the boron trialkoxide; and thereafter evaporating off the solvent.
    Type: Grant
    Filed: June 18, 1981
    Date of Patent: January 18, 1983
    Assignees: Dainippon Ink & Chemicals Inc., Kawamura Institute of Chemical Research
    Inventors: Tesshu Miyahara, Yoshi Arai, Kazuo Kimura