Granted Patent
Utility
US 4,493,544 · App. 06/492,719
Focal-plane shutter
Inventor:
Kimio Uematsu
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: May 9, 1983
Inventor
Kimio Uematsu
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.