Granted Patent
Utility
US 4,386,163 · App. 06/334,571
Fluorophosphate optical glass
Inventor:
Hiroyuki Kodama
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Dec 28, 1981
Inventor
Hiroyuki Kodama
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.