Patents by Inventor Toshiro Unoki

Toshiro Unoki 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).

  • Disk drive unit, controller for actuator, and method for controlling hard disk drive and disk drive unit
    Patent number: 6930849
    Abstract: In a hard disk drive where data is read from and written to a magnetic disk by a magnetic head in accordance with a command from a host computer, a moving distance of the magnetic head in a radial direction is detected within a predetermined period of time. The magnetic head is moved for seeking by a predetermined distance when the moving distance detected is small. The system and method of the present invention reduces write failures due to the undulation of a lubricant film on the magnetic disk by effectively preventing undulation.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: August 16, 2005
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Akira Tokizono, Shiroh Aono, Shunichiro Ota, Toshiro Unoki, Minoru Hashimoto
  • Disk drive unit, controller for actuator, and method for controlling hard disk drive and disk drive unit
    Publication number: 20030086200
    Abstract: In a hard disk drive where data is read from and written to a magnetic disk by a magnetic head in accordance with a command from a host computer, a moving distance of the magnetic head in a radial direction is detected within a predetermined period of time. The magnetic head is moved for seeking by a predetermined distance when the moving distance detected is small. The system and method of the present invention reduces write failures due to the undulation of a lubricant film on the magnetic disk by effectively preventing undulation.
    Type: Application
    Filed: November 7, 2002
    Publication date: May 8, 2003
    Applicant: International Business Machines Corporation
    Inventors: Akira Tokizono, Shiroh Aono, Shunichiro Ota, Toshiro Unoki, Minoru Hashimoto