Patents by Inventor David T. James

David T. James 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).

  • System and method for servowriting a magnetic disk drive
    Patent number: 5339204
    Abstract: A magnetic disk drive is provided with a system and method for writing a servo pattern after the head disk assembly (HDA) is sealed. A clock track is written inside the sealed HDA using a Monte Carlo technique. The clock track is read by a magneto-optical head through a window in the HDA housing, and the time transitions therefrom are used to control the product heads. The entire servo pattern for the disk drive is thus written with the HDA unit completely sealed.
    Type: Grant
    Filed: December 11, 1992
    Date of Patent: August 16, 1994
    Assignee: International Business Machines Corporation
    Inventors: David T. James, Anthony W. Leonard, Peter J. Elliott