Granted Patent
Utility
US 6,574,437 · App. 09/883,338
Focus detection apparatus
Inventor:
Takayuki Sensui
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Jun 19, 2001
Inventor
Takayuki Sensui
Assignee (at issue)
Pentax Corporation
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.