Granted Patent
Utility
US 6,810,168 · App. 10/158,399
Tunable add/drop node
Inventors:
Dazeng Feng, Wenhua Lin, Xiaoming Yin
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: May 30, 2002
Inventors
Dazeng Feng
Wenhua Lin
Xiaoming Yin
Assignee (at issue)
Kotura, 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.