Granted Patent
Utility
US 5,397,887 · App. 08/187,066
Focus detection apparatus having multiple detecting zones
Inventor:
Takayuki Sensui
Patented Case
View Patent ↗
Granted: Mar 14, 1995
Filed: Jan 27, 1994
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.