Granted Patent
Utility
US 4,262,995 · App. 06/017,625
Planar star coupler device for fiber optics
Inventor:
Gregory L. Tangonan
Patented Case
View Patent ↗
Granted: Apr 21, 1981
Filed: Mar 5, 1979
Inventor
Gregory L. Tangonan
Assignee (at issue)
Hughes Aircraft Company
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.