Patents by Inventor Haruyoshi Kato

Haruyoshi Kato 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).

  • Test method of a magnetic disk and magnectic disk tester
    Patent number: 7929232
    Abstract: A test burst signal is overwritten from a write end position over a connecting region determined by positional deviation between a read head and a write head and a peripheral speed of a disk. Since, therefore, the overwritten signal portion is overlapped on the test burst signal written at a write start point, it is possible to reduce a width of the connecting region to thereby reduce a test inhibit region.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: April 19, 2011
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Kenichi Shitara, Haruyoshi Kato
  • TEST METHOD OF A MAGNETIC DISK AND MAGNECTIC DISK TESTER
    Publication number: 20080198493
    Abstract: A test burst signal is overwritten from a write end position over a connecting region determined by positional deviation between a read head and a write head and a peripheral speed of a disk. Since, therefore, the overwritten signal portion is overlapped on the test burst signal written at a write start point, it is possible to reduce a width of the connecting region to thereby reduce a test inhibit region.
    Type: Application
    Filed: February 20, 2008
    Publication date: August 21, 2008
    Inventors: Kenichi SHITARA, Haruyoshi Kato