Granted Patent
Utility
US 5,223,980 · App. 07/885,899
Lens barrel operating mechanism
Inventor:
Takuji Hamasaki
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: May 20, 1992
Inventor
Takuji Hamasaki
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.