Patents by Inventor Kishan K. Kumbla

Kishan K. Kumbla 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).

  • Adaptive track shape control during self servo-write
    Patent number: 7881004
    Abstract: In a method for implementing track shape control during a self servo-write process, an error in a targeted path for writing servo data onto a first track of a disk is detected. The error is correlated with a second error for a targeted path in a previously written track of the disk. A correction is generated for a feed-forward signal used to position a writing element which is used to write servo data for a subsequent track of the disk.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: February 1, 2011
    Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.
    Inventors: Kishan K. Kumbla, Steven Smith
  • ADAPTIVE TRACK SHAPE CONTROL DURING SELF SERVO-WRITE
    Publication number: 20100067134
    Abstract: In a method for implementing track shape control during a self servo-write process, an error in a targeted path for writing servo data onto a first track of a disk is detected. The error is correlated with a second error for a targeted path in a previously written track of the disk. A correction is generated for a feed-forward signal used to position a writing element which is used to write servo data for a subsequent track of the disk.
    Type: Application
    Filed: September 18, 2008
    Publication date: March 18, 2010
    Inventors: Kishan K. Kumbla, Steven Smith
  • Read write offset error correction using geometric reference in self servo write process
    Patent number: 7586709
    Abstract: A hard disk drive having a self servo write offset error correction mechanism to improve self servo write process is disclosed. In accordance with certain aspects of the present invention, there is provided a self servo write method that can measure an accurate position offset between the read-head element and write-head element incorporated in a disk drive before servo data is recorded on the disk provided in the disk drive.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: September 8, 2009
    Assignee: Hitachi Global Storage Technologies Netherlands B.V.
    Inventors: Craig Fukushima, Kishan K. Kumbla, Mantle M. Yu
  • Read write offset error correction using geometric reference in self servo write process
    Publication number: 20090086365
    Abstract: A hard disk drive having a self servo write offset error correction mechanism to improve self servo write process is disclosed. In accordance with certain aspects of the present invention, there is provided a self servo write method that can measure an accurate position offset between the read-head element and write-head element incorporated in a disk drive before servo data is recorded on the disk provided in the disk drive.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Inventors: Craig Fukushima, Kishan K. Kumbla, Mantle M. Yu