Granted Patent
Utility
US 3,977,764 · App. 05/611,252
Variable coupler for optical fibers
Inventors:
Luigi d'Auria, Benoit Le Guen, Erich Spitz
Patented Case
View Patent ↗
Granted: Aug 31, 1976
Filed: Sep 8, 1975
Inventors
Luigi d'Auria
Benoit Le Guen
Erich Spitz
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.