Patents by Inventor Katsutoshi Hirasawa

Katsutoshi Hirasawa 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).

  • Patent number: 7196512
    Abstract: The magnetic head tester of the present invention drives a medium for rotation to float a slider from the medium so as to test a magnetic head for its characteristics, and the tester includes a holder removably holding the slider opposed to the surface of the medium, and suspension means provided in the holder which has the same function as a suspension supporting the slider in a real apparatus. With this tester, tests can be executed by exchanging the slider alone, and it is unnecessary to discard the suspension even when the magnetic head is judged to be defective, thus the loss of production costs for the suspension and processing costs for assembling the slider in the suspension can be avoided.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: March 27, 2007
    Assignee: Fujitsu Limited
    Inventors: Norio Kainuma, Hidehiko Kira, Kenji Kobae, Hiroshi Kobayashi, Katsutoshi Hirasawa, Takatoyo Yamakami, Masumi Katayama, Shinji Hiraoka
  • Publication number: 20040104722
    Abstract: The magnetic head tester of the present invention drives a medium (40) for rotation to float a slider (10) from the medium (40) so as to test a magnetic head for its characteristics, and the tester comprises a holder (20) removably holding the slider (10) opposed to the surface of the medium (40), and suspension means (24) provided in the holder (20) which has the same function as a suspension supporting the slider (10) in a real apparatus. With this tester, tests can be executed by exchanging the slider (10) alone, and it is unnecessary to discard the suspension even when the magnetic head is judged to be out or order, thus loss of production cost for the suspension and processing cost for assembling the slider in the suspension can be avoided.
    Type: Application
    Filed: November 26, 2003
    Publication date: June 3, 2004
    Applicant: FUJITSU LIMITED
    Inventors: Norio Kainuma, Hidehiko Kira, Kenji Kobae, Hiroshi Kobayashi, Katsutoshi Hirasawa, Takatoyo Yamakami, Masumi Katayama, Shinji Hiraoka