Granted Patent
Utility
US 6,236,506 · App. 09/404,416
Reflection-type optical circulation utilizing a lens and birefringent plates
Inventor:
Simon Cao
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Sep 23, 1999
Inventor
Simon Cao
Assignee (at issue)
Avanex 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.