Granted Patent
Utility
US 6,351,581 · App. 09/040,477
Optical add-drop multiplexer having an interferometer structure
Inventors:
Christopher Doerr, Yuan Li
Patented Case
View Patent ↗
Granted: Feb 26, 2002
Filed: Mar 17, 1998
Inventors
Christopher Doerr
Yuan Li
Assignee (at issue)
Agere Systems Optoelectronics Guardian Corporation
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.