Granted Patent
Utility
US 4,623,233 · App. 06/841,016
Electromagnetically driven shutter device
Inventors:
Minoru Yamada, Eiji Ito, Masaru Nagai
Patented Case
View Patent ↗
Granted: Nov 18, 1986
Filed: Mar 17, 1986
Inventors
Minoru Yamada
Eiji Ito
Masaru Nagai
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.