Granted Patent
Utility
US 5,837,346 · App. 08/749,983
Projection screens having light collimating and light diffusing properties
Inventors:
William Langille, Robin J. T. Clabburn
Patented Case
View Patent ↗
Granted: Nov 17, 1998
Filed: Nov 15, 1996
Inventors
William Langille
Robin J. T. Clabburn
Assignees (at issue)
Nashua Corporation
Nashua Photo Ltd.
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.