Granted Patent
Utility
US 5,262,836 · App. 07/810,087
Coherent double homodyne optical backscatter filter
Inventor:
Charles E. Nourrcier
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Dec 19, 1991
Inventor
Charles E. Nourrcier
Assignee (at issue)
Hughes Aircraft Company
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.