Granted Patent
Utility
US 5,109,251 · App. 07/622,593
Photographic color copying apparatus
Inventors:
Rolf Bronnimann, Harald Maxeiner
Patented Case
View Patent ↗
Granted: Apr 28, 1992
Filed: Dec 5, 1990
Inventors
Rolf Bronnimann
Harald Maxeiner
Assignee (at issue)
Gretag Systems, Inc.
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.