Granted Patent
Utility
US 4,789,221 · App. 07/048,109
Light valve projector apparatus having increased light efficiency
Inventor:
Thomas T. True
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: May 8, 1987
Inventor
Thomas T. True
Assignee (at issue)
General Electric 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.