Granted Patent
Utility
US 5,936,776 · App. 08/928,445
Focusable front projection lens systems for use with large screen formats
Inventor:
Melvyn H. Kreitzer
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Sep 12, 1997
Inventor
Melvyn H. Kreitzer
Assignee (at issue)
U.S. Precision Lens Incorporated
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.