Patents by Inventor Mikio Takehara

Mikio Takehara 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 and method for its production
    Patent number: 5464674
    Abstract: A magnetic recording medium comprising a magnetic recording layer and at least one protective layer formed on the recording layer, wherein the outermost protective layer on the side exposed to air is made of an oxide film.
    Type: Grant
    Filed: January 12, 1993
    Date of Patent: November 7, 1995
    Assignee: Asahi Glass Company Ltd.
    Inventors: Ichiro Makino, Akira Mitsui, Mikio Takehara, Eiichi Ando, Junichi Ebisawa, Koichi Suzuki, Kiyoshi Matsumoto, Toru Iseda, Susumu Suzuki
  • Method for producing a specified zirconium-silicon amorphous oxide film composition by sputtering
    Patent number: 5209835
    Abstract: A magnetic recording medium comprising a magnetic recording layer and at least one protective layer formed on the recording layer, wherein the outermost protective layer on the side exposed to air is made of an oxide film.
    Type: Grant
    Filed: March 7, 1990
    Date of Patent: May 11, 1993
    Assignee: Asahi Glass Company Ltd.
    Inventors: Ichiro Makino, Akira Mitsui, Mikio Takehara, Eiichi Ando, Junichi Ebisawa, Koichi Suzuki, Kiyoshi Matsumoto, Toru Iseda, Susumu Suzuki