Patents by Inventor Yoshiharu Koike

Yoshiharu Koike 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 head having a stabilized zirconia slider
    Patent number: 4835640
    Abstract: A magnetic recording device comprises a magnetic disk having a magnetic recording layer formed on a substrate, a slider, a magnetic core attached to the slider, and a magnetic head adapted to be brought into contact with and separated from the surface of the magnetic disk. In this magnetic recording device, the magnetic recording layer of the magnetic disk is made of a Co-based alloy and the slider of the magnetic head has stabilized zirconia as the main phase thereof.
    Type: Grant
    Filed: November 19, 1987
    Date of Patent: May 30, 1989
    Assignee: Hitachi Metals Ltd.
    Inventors: Juro Endo, Shiro Murakami, Yukiharu Takada, Yoshiharu Koike
  • Magnetic recording device having a stabilized zirconia slider and a cobalt based recording medium
    Patent number: 4709284
    Abstract: A magnetic recording device comprises a magnetic disk having a magnetic recording layer formed on a substrate, a slider, a magnetic core attached to the slider, and a magnetic head adapted to be brought into contact with and separated from the surface of the magnetic disk. In this magnetic recording device, the magnetic recording layer of the magnetic disk is made of a Co-based alloy and the slider of the magnetic head has stabilized zirconia as the main phase thereof.
    Type: Grant
    Filed: September 19, 1985
    Date of Patent: November 24, 1987
    Assignee: Hitachi Metals, Ltd.
    Inventors: Juro Endo, Shiro Murakami, Yukiharu Takada, Yoshiharu Koike
  • Ceramic substrate for a thin layer magnetic head
    Patent number: 4681813
    Abstract: A thin layer magnetic head comprising a ceramic substrate consisting essentially of 100 parts by weight of a ceramic material and 0.05 to 5 parts by weight of at least one compound from the group consisting of silicon oxide and iron oxide.
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: July 21, 1987
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hirohide Yamada, Masahiko Sakakibara, Yoshiharu Koike