Granted Patent
Utility
US 4,550,991 · App. 06/675,310
Device for detecting code on film cartridge
Inventors:
Sunao Ishizaka, Osamu Maida
Patented Case
View Patent ↗
Granted: Nov 5, 1985
Filed: Nov 27, 1984
Inventors
Sunao Ishizaka
Osamu Maida
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.