Granted Patent
Utility
US 4,457,596 · App. 06/424,262
Behind diaphragm lens
Inventor:
Koichi Wakamiya
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Sep 27, 1982
Inventor
Koichi Wakamiya
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.