Granted Patent
Utility
US 6,469,824 · App. 09/773,491
Bi-directional pumped optical fiber amplifier with fault detection means and novel pump control
Inventor:
Akira Sasaki
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Feb 2, 2001
Inventor
Akira Sasaki
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.