Granted Patent
Utility
US 4,739,501 · App. 06/771,451
Optical multiplexer/demultiplexer
Inventor:
Kurt Fussganger
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: Aug 30, 1985
Inventor
Kurt Fussganger
Assignee (at issue)
Alcatel N.V.
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.