Granted Patent
Utility
US 5,347,380 · App. 07/989,365
Liquid crystal optical polarization separator with parrallel alignment on one substrate, perpendicular on other
Inventor:
Jean-Claude Lehureau
Patented Case
View Patent ↗
Granted: Sep 13, 1994
Filed: Dec 11, 1992
Inventor
Jean-Claude Lehureau
Assignee (at issue)
Thomson-CSF
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.