Patents by Inventor John Andrew Herrod

John Andrew Herrod 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).

  • Data processing system including method and apparatus for performing graphics clipping operations
    Patent number: 6005574
    Abstract: A list of graphics orders defining the graphics objects to be displayed is processed to generate a list of modified graphics orders representing those portions of the graphics objects not overlaid by an overlapping area. The mechanisms for clipping to the inside of a bounded area are adapted to determine what portion of an area of graphics lies outside a bounded area. The invention includes techniques for dealing with graphics in the form of lines, areas bounded by lines, and images including arrays of picture elements or symbol set characters.
    Type: Grant
    Filed: February 9, 1995
    Date of Patent: December 21, 1999
    Assignee: International Business Machines Corporation
    Inventor: John Andrew Herrod