Patents by Inventor James John Stirn

James John Stirn 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).

  • Method of marking and detecting disc index
    Patent number: 6888154
    Abstract: The present invention allows placement of a disc at an angular orientation by marking the disc with an index mark or feature that can be detected, such as by a disc stacking machine used in a servo track writer. Either index is used to rotate the disc to the angular position. The present invention includes marking a disc surface with a mark or feature. An apparatus, such a stacking machine, will read the mark or feature to orient the disc in an angular position. The stacking machine will stack the positioned discs for servo track writing.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: May 3, 2005
    Assignee: Seagate Technology LLC
    Inventors: Michael William Pfeiffer, James John Stirn, Richard Gordon Goodrich
  • Method of marking and detecting disc index
    Publication number: 20030075695
    Abstract: The present invention allows placement of a disc at an angular orientation by marking the disc with an index mark or feature that can be detected, such as by a disc stacking machine used in a servo track writer. Either index is used to rotate the disc to the angular position. The present invention includes marking a disc surface with a mark or feature. An apparatus, such a stacking machine, will read the mark or feature to orient the disc in an angular position. The stacking machine will stack the positioned discs for servo track writing.
    Type: Application
    Filed: March 6, 2002
    Publication date: April 24, 2003
    Inventors: Michael William Pfeiffer, James John Stirn, Richard Gordon Goodrich