Granted Patent
Utility
US 5,204,923 · App. 07/839,056
Unit for amplifying light signals in optical fiber transmission lines
Inventors:
Giorgio Grasso, Aldo Righetti
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Feb 18, 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.