Granted Patent
Utility
US 4,676,607 · App. 06/701,763
Behind stop lens
Inventor:
Koichi Wakamiya
Patented Case
View Patent ↗
Granted: Jun 30, 1987
Filed: Feb 14, 1985
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.