Granted Patent
Utility
US 4,497,015 · App. 06/468,551
Light illumination device
Inventors:
Kunio Konno, Masashi Okada
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Feb 22, 1983
Inventors
Kunio Konno
Masashi Okada
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.