Granted Patent
Utility
US 6,819,429 · App. 09/827,141
Multi-pass optical spectrum analyzer having a polarization-dependent tunable filter
Inventors:
Gang He, Daniel Gariepy, Gregory Walter Schinn, Martin Lamonde
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Apr 6, 2001
Inventors
Gang He
Daniel Gariepy
Gregory Walter Schinn
Martin Lamonde
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.