Granted Patent
Utility
US 5,579,159 · App. 08/355,200
Optical multilayer thin film and beam splitter
Inventor:
Taku Ito
Patented Case
View Patent ↗
Granted: Nov 26, 1996
Filed: Dec 8, 1994
Inventor
Taku Ito
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.