Granted Patent
Utility
US 6,678,080 · App. 09/923,845
Optical add/drop multiplexer
Inventors:
Ari Tervonen, Markku Anttoni Oksanen
Patented Case
View Patent ↗
Granted: Jan 13, 2004
Filed: Aug 7, 2001
Inventors
Ari Tervonen
Markku Anttoni Oksanen
Assignee (at issue)
Nokia
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.