Granted Patent
Utility
US 4,600,289 · App. 06/648,246
Aperture control system for cameras
Inventors:
Osamu Maida, Akira Katayama
Patented Case
View Patent ↗
Granted: Jul 15, 1986
Filed: Sep 7, 1984
Inventors
Osamu Maida
Akira Katayama
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.