Granted Patent
Utility
US 6,449,091 · App. 08/754,032
Optical isolator
Inventors:
Yihao Cheng, Neil Teitelbaum
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Dec 3, 1996
Inventors
Yihao Cheng
Neil Teitelbaum
Assignee (at issue)
JDS Fitel 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.