Granted Patent
Utility
US 6,429,929 · App. 09/821,032
Method and apparatus for measuring phase differences between intensity-modulated optical signals
Inventors:
François Babin, Normand Cyr
Patented Case
View Patent ↗
Granted: Aug 6, 2002
Filed: Mar 30, 2001
Inventors
François Babin
Normand Cyr
Assignee (at issue)
Exfo Electro-Optical Engineering, 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.