Granted Patent
Utility
US 4,636,041 · App. 06/675,309
Aperture device for zoom lens
Inventors:
Yoshiro Kotaka, Hideshi Naito, Yoshiharu Shiokama
Patented Case
View Patent ↗
Granted: Jan 13, 1987
Filed: Nov 27, 1984
Inventors
Yoshiro Kotaka
Hideshi Naito
Yoshiharu Shiokama
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.