Granted Patent
Utility
US 6,731,405 · App. 10/067,619
Printing plates containing ink cells in both solid and halftone areas
Inventor:
Mark Samworth
Patented Case
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Granted: May 4, 2004
Filed: Feb 4, 2002
Inventor
Mark Samworth
Assignee (at issue)
Artwork Systems
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.