Granted Patent
Utility
US 4,443,084 · App. 06/311,659
Film winding device
Inventors:
Toshimitsu Harada, Koji Watanabe
Patented Case
View Patent ↗
Granted: Apr 17, 1984
Filed: Oct 15, 1981
Inventors
Toshimitsu Harada
Koji Watanabe
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.