Patents by Inventor Hideo Katagiri

Hideo Katagiri 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).

  • Manufacturing method of magnetic material for metallic thin film magnetic recording media and metallic thin film magnetic recording medium
    Patent number: 5925404
    Abstract: The quantity of impurities in a magnetic material is decreased to produce a magnetic material with good quality, and a decrease in the cost of the magnetic material is realized by desulfurization. A magnetic raw material for metallic thin film magnetic recording media which contains sulfur more than 20 ppm is desulfurized to obtain the magnetic material for metallic thin film magnetic recording media with the sulfur content adjusted to 20 ppm or below, and a metallic thin film magnetic recording medium having a magnetic layer vaporized thereon with the magnetic material is fabricated.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: July 20, 1999
    Assignee: Sony Corporation
    Inventors: Kazunobu Chiba, Tustomu Takeda, Hiroyuki Yamada, Hideo Katagiri, Hiroshi Osumi