Granted Patent
Utility
US 6,577,455 · App. 09/933,896
Wide angle projection lens and projection display device
Inventor:
Shinsuke Shikama
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Aug 22, 2001
Inventor
Shinsuke Shikama
Assignee (at issue)
MITSUBISHI ELECTRIC 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.