Granted Patent
Utility
US 5,113,459 · App. 07/647,141
Optical fiber telecommunication line with separate, optically transmitted service channels
Inventors:
Giorgio Grasso, Mario Tamburello
Patented Case
View Patent ↗
Granted: May 12, 1992
Filed: Jan 29, 1991
Inventors
Giorgio Grasso
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.