Granted Patent
Utility
US 4,298,263 · App. 06/104,841
Electromagnetic release device in a camera
Inventor:
Hiroshi Hasegawa
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Dec 18, 1979
Inventor
Hiroshi Hasegawa
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.