Granted Patent
Utility
US 4,298,265 · App. 06/152,603
Light-intercepting device in a camera
Inventors:
Etsuo Tanaka, Hironobu Kato
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: May 23, 1980
Inventors
Etsuo Tanaka
Hironobu Kato
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.