Granted Patent
Utility
US 6,829,438 · App. 09/899,151
Add/drop multiplexing in WDM optical networks
Inventors:
Wen Liu, Ping Wai Wan, Derrick Remedios
Patented Case
View Patent ↗
Granted: Dec 7, 2004
Filed: Jul 6, 2001
Inventors
Wen Liu
Ping Wai Wan
Derrick Remedios
Assignee (at issue)
Tropic Networks 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.