Granted Patent
Utility
US 4,393,399 · App. 06/229,584
Method and apparatus for partial electronic retouching of colors
Inventors:
Uwe Gast, Eberhard Hennig, Dieter Preuss, Heinz Taudt, Klaus Wellendorf
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Jan 8, 1981
Inventors
Uwe Gast
Eberhard Hennig
Dieter Preuss
Heinz Taudt
Klaus Wellendorf
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.