Patents by Inventor Dona Davidson

Dona Davidson 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).

  • Multibit screening of print documents in a PDL environment
    Patent number: 6873440
    Abstract: A high addressable multibit screening device and method for use in a PDL interpreter environment achieve improved printing resolution and quality. A PDL interpreter receives a PDL document from a host source, which identifies one or more objects that can be fully toned (black) or partially toned (line art or images). Each of these objects can be processed differently. Fully toned objects are processed within the interpreter and directly output in a predetermined output. Partially toned objects are sent to a high addressable screening module within the interpreter for processing prior to outputting in a desired output format. The high addressable screening module screens the partially toned objects to obtain multibit screened data for output.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: March 29, 2005
    Assignee: Xerox Corporation
    Inventors: Dona Davidson, Francis K. Tse, Harry L. Parker, Ramesh Nagarajan, Michael L. Davidson