Patents by Inventor Toshiyuki Okawa

Toshiyuki Okawa 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 apparatus and method with actuator control using servo sector information read out at particular timings
    Patent number: 5473482
    Abstract: A magnetic disc apparatus controls the output timing of control current data by use of a servo estimation type observer. Servo information is read from a servo sector of a magnetic disc, decoded, and used to calculate control current data. Before the servo information of the following servo sector is fully decoded, the calculated control current data from the previously read servo sector is output, converted to a current, and sent to the actuator of a magnetic head.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: December 5, 1995
    Assignee: NEC Corporation
    Inventors: Kazuhiko Saito, Toshiyuki Okawa