Patents by Inventor Toshiaki Hashidate

Toshiaki Hashidate 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 for vertical magnetic recording and method of producing same
    Patent number: 4811142
    Abstract: A main pole exciting type magnetic head for vertical magnetic recording, including a lower slider formed of a magnetic material, a winding core formed of a magnetic material, a substrate formed of a non-magnetic material and disposed so that one end face thereof is positioned on an upper surface of the winding core, a main pole film formed on one end face of the substrate, and an upper slider formed of a magnetic material, the upper slider being opposed to the lower slider through a vertical magnetic recording medium; as well as a method of producing such magnetic head.
    Type: Grant
    Filed: January 6, 1987
    Date of Patent: March 7, 1989
    Assignee: Alps Electric Co.
    Inventors: Keishi Nakashima, Tetsuya Iwata, Yasuo Tanaka, Toshiaki Hashidate
  • Magnetic head formed by composite main pole film and winding core for perpendicular magnetic recording
    Patent number: 4768121
    Abstract: A magnetic head for perpendicular magnetic recording is disclosed which is composed of a substrate made of a non-magnetic material, a main pole film formed on the side surface of the substrate, a protective film for covering the main pole film, a winding core on which the substrate is pasted such that the main pole film is situated above the winding core, and a slider to which the winding core is secured through an adhesive.
    Type: Grant
    Filed: December 31, 1986
    Date of Patent: August 30, 1988
    Assignee: Alps Electric Co., Ltd.
    Inventors: Keishi Nakashima, Tetsuya Iwata, Yasuo Tanaka, Toshiaki Hashidate