Granted Patent
Utility
US 6,719,446 · App. 09/938,777
Semiconductor light source for providing visible light to illuminate a physical space
Inventor:
Densen Cao
Patented Case
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Granted: Apr 13, 2004
Filed: Aug 24, 2001
Inventor
Densen Cao
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.