Granted Patent
Utility
US 4,422,744 · App. 06/358,838
Apparatus for signal transmission and reception between camera and attachment
Inventor:
Osamu Maida
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Mar 16, 1982
Inventor
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.