Granted Patent
Utility
US 4,482,231 · App. 06/476,936
Light-intercepting blade for a light control device
Inventors:
Hironobu Kato, Masaru Ichikawa, Atsushi Sano, Yoshiaki Tanabe, Yoshiyuki Nakano
Patented Case
View Patent ↗
Granted: Nov 13, 1984
Filed: Mar 21, 1983
Inventors
Hironobu Kato
Masaru Ichikawa
Atsushi Sano
Yoshiaki Tanabe
Yoshiyuki Nakano
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.