Granted Patent
Utility
US 4,231,649 · App. 06/044,975
Viewfinder display in a single lens reflex camera
Inventors:
Makoto Kimura, Yutaka Iizuka
Patented Case
View Patent ↗
Granted: Nov 4, 1980
Filed: Jun 4, 1979
Inventors
Makoto Kimura
Yutaka Iizuka
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.