Granted Patent
Utility
US 6,481,852 · App. 09/797,844
Projector apparatus comprising a light composing optical system vertically stacked with respect to a light separation optical system
Inventor:
Akihiro Osaka
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Mar 5, 2001
Inventor
Akihiro Osaka
Assignee (at issue)
NEC 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.