Granted Patent
Utility
US 4,736,099 · App. 06/908,820
Scan device with light mixer and diffusing means for half-tone transparency originals
Inventor:
Thomas Zelenka
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: Sep 18, 1986
Inventor
Thomas Zelenka
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.