Granted Patent
Utility
US 5,233,463 · App. 07/857,740
Active fiber optical amplifier for a fiber optics telecommunication line
Inventors:
Giorgio Grasso, Aldo Righetti
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Mar 26, 1992
Inventors
Giorgio Grasso
Aldo Righetti
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.