Granted Patent
Utility
US 6,788,460 · App. 10/120,785
Projection screen apparatus
Inventors:
Richard M. Knox, Dale S. Walker
Patented Case
View Patent ↗
Granted: Sep 7, 2004
Filed: Apr 12, 2002
Inventors
Richard M. Knox
Dale S. Walker
Assignee (at issue)
Duke University
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.