Patents by Inventor Hal Hijalmar Ottesen

Hal Hijalmar Ottesen 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).

  • Power saving method and apparatus for use in multiple frequency zone drives
    Patent number: 5787292
    Abstract: A multiple frequency zoned disk storage device in which data is read from and/or written to the disk at two or more discrete disk velocities is disclosed. The disk storage device includes a low power mode where information is read/written from/to the disk while the disk velocity is reduced to conserve power. The allocation track locations into zones on the drive reduces the number of zone bit frequencies the storage device must handle.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: July 28, 1998
    Assignee: International Business Machines Corporation
    Inventors: Hal Hijalmar Ottesen, Gordon J. Smith