Granted Patent
Utility
US 4,239,362 · App. 06/037,842
Camera film advancing apparatus
Inventors:
Akira Katayama, Toshiaki Hozumi
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: May 10, 1979
Inventors
Akira Katayama
Toshiaki Hozumi
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.