Patents by Inventor Mark Andrew Berquist

Mark Andrew Berquist 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).

  • Interleaved dibit detection for direct access storage device (DASD)
    Patent number: 6222691
    Abstract: A method for detecting servo data and an interleaved dibit detection apparatus are provided for servo data detection in a direct access storage device. The interleaved dibit detection apparatus includes a new dibit threshold detector for detecting a predefined threshold level of a new interleave servo signal and providing a new detected dibit output. An old dibit threshold detector detects the predefined threshold level of an old interleave servo signal and provides an old detected dibit output. A combining function coupled to the new dibit threshold detector and the old dibit threshold detector provides a combined detected dibit output.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: April 24, 2001
    Assignee: International Business Machines Corporation
    Inventors: Mark Andrew Berquist, Robert Andrew Kertis