Granted Patent
Utility
US 4,619,508 · App. 06/726,232
Illumination optical arrangement
Inventors:
Masato Shibuya, Makoto Uehara
Patented Case
View Patent ↗
Granted: Oct 28, 1986
Filed: Apr 23, 1985
Inventors
Masato Shibuya
Makoto Uehara
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.