Granted Patent
Utility
US 6,178,044 · App. 09/387,206
Method and system for providing an optical circulator
Inventors:
Wei Li, Yan Tang
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Aug 31, 1999
Inventors
Wei Li
Yan Tang
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.