Patents by Inventor Masuo Asakawa

Masuo Asakawa 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 disk
    Patent number: 5043213
    Abstract: A magnetic disc wherein a shielding layer is provided between a recording layer for recording data therein and a substrate to shield electromagnetic waves generated from a magnetic head which records/regenerates data in/from said recording layer.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: August 27, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masuo Asakawa, Hikaru Ogawa, Kenji Hirata