Granted Patent
Utility
US 4,274,726 · App. 06/154,571
Automatic film winder for camera
Inventors:
Saburo Yoneyama, Minoru Yamada, Yasutsugu Nakagawa, Shizuo Ishii, Masao Kamio
Patented Case
View Patent ↗
Granted: Jun 23, 1981
Filed: May 29, 1980
Inventors
Saburo Yoneyama
Minoru Yamada
Yasutsugu Nakagawa
Shizuo Ishii
Masao Kamio
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.