Granted Patent
Utility
US 6,493,140 · App. 09/418,136
Polarization splitter and combiner and optical devices using the same
Inventors:
Wei Li, Yanfeng Yang, Feng Liu, Wei Luo
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Oct 14, 1999
Inventors
Wei Li
Yanfeng Yang
Feng Liu
Wei Luo
Assignee (at issue)
Oplink Communications, LLC
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.