Granted Patent
Utility
US 4,540,264 · App. 06/665,398
Photographing lens focusing device
Inventors:
Koichi Daitoku, Nobuo Okabe
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Oct 26, 1984
Inventors
Koichi Daitoku
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.