Granted Patent
Utility
US 5,728,509 · App. 08/470,273
Method of manufacturing an optical device
Inventors:
Akira Eda, Kiyofumi Muro
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Jun 6, 1995
Inventors
Akira Eda
Kiyofumi Muro
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.