Granted Patent
Utility
US 4,775,209 · App. 07/022,707
Fiber-optic coupler comprising intertwined monomode fibers of different diameter
Inventor:
William J. Stewart
Patented Case
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Granted: Oct 4, 1988
Filed: Feb 20, 1987
Inventor
William J. Stewart
Assignee (at issue)
Plessey Overseas Limited
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.