Patents by Inventor James L. Bush, III

James L. Bush, III 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 and apparatus for calibrating a printhead
    Patent number: 7380897
    Abstract: A method for calibrating a printhead includes printing a test pattern, scanning the test pattern to obtain calibration data, performing an ink drop velocity optimization for the printhead using the calibration data, and determining a bi-directional offset based on the calibration data.
    Type: Grant
    Filed: June 6, 2005
    Date of Patent: June 3, 2008
    Assignee: Lexmark International, Inc.
    Inventors: Timothy L. Anderson, James L. Bush, III, Michael D. Donovan, Nathan W. Foley, Martin A. Johnson, Patrick L. Kroger, Tommy O. Lowe
  • System and method for ink jet printhead detection
    Patent number: 7128385
    Abstract: The invention provides a system and method for detecting the presence of an ink jet printhead when a printhead controller fails to properly identify an installed printhead using a printhead identification device. The system includes a printhead including heater resistors and control elements, and a controller connected to the printhead via address and data lines. When the controller fails to properly identify an installed printhead, the controller operates to bias the control elements in a predetermined manner via at least one address line, detect a signal via the data lines, and generate a signal indicative of the presence of the installed printhead.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: October 31, 2006
    Assignee: Lexmark International, Inc.
    Inventors: James L. Bush, III, Marenz S. Ganadillo, Tommy O. Lowe, Bryan D. McKinley, Douglas L. Robertson