Granted Patent
Utility
US 4,378,965 · App. 06/123,510
Sprocket wheel for photographic camera
Inventors:
Shizuo Ishii, Saburo Yoneyama
Patented Case
View Patent ↗
Granted: Apr 5, 1983
Filed: Feb 22, 1980
Inventors
Shizuo Ishii
Saburo Yoneyama
Assignee (at issue)
Konishiroku Photo Industry Co., Ltd.
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.