Granted Patent
Utility
US 4,545,666 · App. 06/550,639
Light emission blocking device of a camera capable of effecting flashlight photography
Inventor:
Hiroshi Wakabayashi
Patented Case
View Patent ↗
Granted: Oct 8, 1985
Filed: Nov 10, 1983
Inventor
Hiroshi Wakabayashi
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.