Granted Patent
Utility
US 5,206,498 · App. 07/893,045
Focus detecting apparatus having variable power condenser lens
Inventor:
Takayuki Sensui
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Jun 3, 1992
Inventor
Takayuki Sensui
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.