Granted Patent
Utility
US 5,278,686 · App. 07/846,276
Optical-fibre telecommunications line with protection device for optical amplifiers
Inventors:
Giorgio Grasso, Aldo Righetti, Mario Tamburello
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Mar 2, 1992
Inventors
Giorgio Grasso
Aldo Righetti
Mario Tamburello
Assignee (at issue)
Pirelli Cavi S.p.A.
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.