Patents by Inventor Takeo Oya

Takeo Oya 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).

  • Diagnostic disk for checking the head alignment of magnetic disk drives
    Patent number: 4694359
    Abstract: A method and apparatus for checking the azimuthal alignment of the magnetic head of a disk drive with respect to a standard head alignment by use of diagnostic disk having plural sectors along a checking track. The sectors include an identification field, a data field and noise areas adjacent to the data field. The patterns recorded in the respective data field and adjacent noise fields being at relative azimuthal angles.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: September 15, 1987
    Assignee: NEC Corporation
    Inventor: Takeo Oya