Granted Patent
Utility
US 4,403,249 · App. 06/156,931
Apparatus for mixing image signals to obtain a printing master
Inventors:
Hans-Georg Knop, Ingo Hoffrichter
Patented Case
View Patent ↗
Granted: Sep 6, 1983
Filed: Jun 6, 1980
Inventors
Hans-Georg Knop
Ingo Hoffrichter
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.