Granted Patent
Utility
US 6,816,285 · App. 09/722,914
Digital darker/lighter for halftone images
Inventor:
Reiner Eschbach
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: Nov 27, 2000
Inventor
Reiner Eschbach
Assignee (at issue)
Xerox Corporation
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.