Patents by Inventor Macduff R. Hughes

Macduff R. Hughes 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).

  • Parallel redundant interpretation in a raster image processor
    Patent number: 6295134
    Abstract: A method and apparatus for interpreting a page description language file defining a sheet to be printed on a printing device. The method including processing in parallel the page description language file by a plurality of redundant interpreters. The output of one of the plurality of redundant interpreters is enabled for each page of the sheet such that one interpreter of the plurality of redundant interpreters produces an output for each page of the sheet.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: September 25, 2001
    Assignee: Adobe Systems Incorporated
    Inventor: Macduff R. Hughes
  • Page description language conversion using sidelining
    Patent number: 6262806
    Abstract: A method and apparatus to convert a document stored in a page sequential representation to a document stored in a page independent representation is described. The method includes receiving the page sequential representation of the document, storing instructions associated with the page sequential representation in an output file in a format determined by the page independent representation, storing a resource associated with the page sequential representation in an external resource file in a format determined by the page sequential representation, and storing in the output file a reference to the external resource file.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: July 17, 2001
    Assignee: Adobe Systems Incorporated
    Inventor: Macduff R. Hughes