Granted Patent
Utility
US 4,529,285 · App. 06/582,635
Light-intercepting blade for a light control device
Inventor:
Kimio Uematsu
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Feb 22, 1984
Inventor
Kimio Uematsu
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.