Patents by Inventor Thinh H. Nguyen

Thinh H. Nguyen 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).

  • Asynchronous track code encodement and detection for disk drive servo control system
    Patent number: 5442498
    Abstract: A disk head position control system having a disk head controller that moves a disk head relative to a surface of a magnetic media disk encoded with a plurality of tracks of a quadrature burst pattern includes a burst pattern that comprises an asynchronous, multi-frequency track address code having burst pattern transitions that extend across the width of a track and are arranged in staggered fashion in alternate tracks such that no transitions between adjacent tracks are aligned in the disk radial direction.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: August 15, 1995
    Assignee: International Business Machines Corporation
    Inventors: Wayne L. Cheung, Chenhuei J. Chaing, Thinh H. Nguyen