Granted Patent
Utility
US 6,809,867 · App. 10/463,552
Illuminating optical system and projection display device including it
Inventor:
Tomoyuki Baba
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: Jun 18, 2003
Inventor
Tomoyuki Baba
Assignee (at issue)
Fuji Photo Optical Co., Ltd.
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.