Granted Patent
Utility
US 5,173,957 · App. 07/758,665
Pump redundancy for optical amplifiers
Inventors:
Neal S. Bergano, Richard F. Druckenmiller, Franklin W. Kerfoot, III, Patrick R. Trischitta
Patented Case
View Patent ↗
Granted: Dec 22, 1992
Filed: Sep 12, 1991
Inventors
Neal S. Bergano
Richard F. Druckenmiller
Franklin W. Kerfoot, III
Patrick R. Trischitta
Assignee (at issue)
AT&T Bell Laboratories
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.