Granted Patent
Utility
US 4,551,751 · App. 06/479,733
Color reduction dependent on tone
Inventor:
Eggert Jung
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Mar 28, 1983
Inventor
Eggert Jung
Assignee (at issue)
Dr. Ing. Rudolf Hell GmbH
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.