Patents by Inventor William B. Willard

William B. Willard 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).

  • Tone reproduction curve linearization
    Patent number: 7948658
    Abstract: A marking device is controlled to mark a media sheet with halftone dots selected from a set of image halftone dot representations. The marking device is controlled to mark a monitored surface with halftone dots selected from a set of control halftone dot representations to form test patches of different nominal marking densities. Measured marking densities are acquired using a density sensor for the test patches marked on the monitored surface. The set of control halftone dot representations is updated based on the measured marking densities and the nominal marking densities.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: May 24, 2011
    Assignee: Xerox Corporation
    Inventors: Brian R. Conrow, Patricia J. Donaldson, Fan Shi, William B. Willard, David C. Craig
  • TONE REPRODUCTION CURVE LINEARIZATION
    Publication number: 20090296175
    Abstract: A marking device is controlled to mark a media sheet with halftone dots selected from a set of image halftone dot representations. The marking device is controlled to mark a monitored surface with halftone dots selected from a set of control halftone dot representations to form test patches of different nominal marking densities. Measured marking densities are acquired using a density sensor for the test patches marked on the monitored surface. The set of control halftone dot representations is updated based on the measured marking densities and the nominal marking densities.
    Type: Application
    Filed: May 27, 2008
    Publication date: December 3, 2009
    Applicant: XEROX CORPORATION
    Inventors: Brian R. Conrow, Patricia J. Donaldson, Fan Shi, William B. Willard, David C. Craig