Patents by Inventor Brian Sudman

Brian Sudman 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).

  • Virtual tracks for repeatable runout compensation
    Patent number: 6952320
    Abstract: The present invention relates to repeatable runout (RRO) compensation of servo control systems that can be used in disc drives or spin-stands. The RRO relates to eccentricity between servo tracks, which were written onto a disc prior to the installation of the disc into the disc drive or spin-stand, and an axis of rotation of the disc. The present invention compensates the servo control loop by canceling the RRO and controlling a head to follow virtual tracks which are eccentric to the data tracks defined by the servo tracks and concentric with the axis of rotation of the disc.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: October 4, 2005
    Assignee: Seagate Technology LLC
    Inventors: Brian Pollock, Alexei H. Sacks, Brian Sudman, James H. McGlennen, Reed D. Hanson