Granted Patent
Utility
US 4,307,948 · App. 06/158,307
Diaphragm control apparatus for camera
Inventors:
Yasunori Kitamura, Sakuji Watanabe, Yoshitaka Araki
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Jun 10, 1980
Inventors
Yasunori Kitamura
Sakuji Watanabe
Yoshitaka Araki
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.