Granted Patent
Utility
US 5,446,593 · App. 08/145,171
Lens advancing mechanism
Inventors:
Takuji Hamasaki, Zenichi Okura
Patented Case
View Patent ↗
Granted: Aug 29, 1995
Filed: Nov 3, 1993
Inventors
Takuji Hamasaki
Zenichi Okura
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.