Granted Patent
Utility
US 6,014,273 · App. 09/098,462
Photometering apparatus
Inventors:
Isamu Hirai, Katsuki Machida
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Jun 17, 1998
Inventors
Isamu Hirai
Katsuki Machida
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.