Granted Patent
Utility
US 6,575,577 · App. 09/970,845
Multiple light valve lighting device or apparatus with wide color palette and improved contrast ratio
Inventor:
Richard Beliveau
Patented Case
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Granted: Jun 10, 2003
Filed: Oct 5, 2001
Inventor
Richard Beliveau
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.