Granted Patent
Utility
US 4,405,220 · App. 06/316,440
Automatic focusing apparatus for a camera
Inventors:
Yosuke Kusaka, Nobuo Okabe
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Oct 29, 1981
Inventors
Yosuke Kusaka
Nobuo Okabe
Assignee (at issue)
Nippon Kogaku K.K.
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.