Granted Patent
Utility
US 4,564,859 · App. 06/543,521
Method and an apparatus for producing color separations for single color printing
Inventors:
Hans-Georg Knop, Michael T. Nowak, Friedrich Redecker, Ralf Tiede
Patented Case
View Patent ↗
Granted: Jan 14, 1986
Filed: Oct 19, 1983
Inventors
Hans-Georg Knop
Michael T. Nowak
Friedrich Redecker
Ralf Tiede
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.