Granted Patent
Utility
US 5,970,263 · App. 09/115,547
Photometering lens for SLR camera and adjusting of photometering device
Inventor:
Isamu Hirai
Patented Case
View Patent ↗
Granted: Oct 19, 1999
Filed: Jul 15, 1998
Inventor
Isamu Hirai
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.