Granted Patent
Utility
US 5,221,840 · App. 07/733,798
Diffuse light collector
Inventor:
John C. Boutet
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Jul 22, 1991
Inventor
John C. Boutet
Assignee (at issue)
EASTMAN KODAK COMPANY
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.