Granted Patent
Utility
US 6,816,237 · App. 10/143,789
Imaging optical instrument
Inventor:
Kenji Ueyama
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: May 14, 2002
Inventor
Kenji Ueyama
Assignee (at issue)
DAINIPPON SCREEN MFG. 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.