Granted Patent
Utility
US 4,396,269 · App. 06/256,305
Shutter release locking device
Inventor:
Sakuji Watanabe
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: Apr 22, 1981
Inventor
Sakuji Watanabe
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.