Granted Patent
Utility
US 5,588,078 · App. 08/513,028
Non-reciprocal optical waveguide coupling device
Inventors:
Yihao Cheng, Gary S. Duck
Patented Case
View Patent ↗
Granted: Dec 24, 1996
Filed: Aug 9, 1995
Inventors
Yihao Cheng
Gary S. Duck
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.