Granted Patent
Utility
US 5,592,250 · App. 08/491,764
Driving mechanism for a photograhing optical system
Inventor:
Hitoshi Shimizu
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Jun 19, 1995
Inventor
Hitoshi Shimizu
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.