Granted Patent
Utility
US 5,999,281 · App. 09/145,480
Holographic projection screen combining an elliptical holographic diffuser and a cylindrical light-collimator
Inventors:
Lynore M. Abbott, Michael M. Wenyon
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Sep 2, 1998
Inventors
Lynore M. Abbott
Michael M. Wenyon
Assignee (at issue)
Polaroid Corporation
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.