Granted Patent
Utility
US 5,999,290 · App. 08/958,496
Optical add/drop multiplexer having complementary stages
Inventor:
Yuan Li
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Oct 27, 1997
Inventor
Yuan Li
Assignee (at issue)
LUCENT TECHNOLOGIES INC.
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.