Granted Patent
Utility
US 5,208,891 · App. 07/772,185
Fiber-optic viewgraph projector
Inventor:
William J. Prysner
Patented Case
View Patent ↗
Granted: May 4, 1993
Filed: Oct 7, 1991
Inventor
William J. Prysner
Assignee (at issue)
United States of America as represented by the Secretary of the Air Force
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.