Granted Patent
Utility
US 6,463,173 · App. 08/550,435
System and method for histogram-based image contrast enhancement
Inventor:
Daniel R. Tretter
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Oct 30, 1995
Inventor
Daniel R. Tretter
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.