Patents by Inventor Kevin L. Colbum

Kevin L. Colbum 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).

  • Methods and apparatus to compensate for power output variations over time
    Patent number: 7551524
    Abstract: A method of compensating for output variations in laser power output over time in a system using a laser to record visible marks on an optical disc, the method comprising (a) applying a test light beam from the laser to the optical disc to determine a test value of an optical parameter, (b) determining a difference between the test value and a predetermined reference value for the optical parameter, and (c) adjusting the laser power output to compensate for the difference.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: June 23, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kevin L. Colbum, D. Mitchel Hanks, Lawrence N. Taugher, Greg J. Lipinski, Andrew L Van Brocklin