Granted Patent
Utility
US 6,711,359 · App. 09/266,093
Optical fiber communication system employing doped optical fiber and Raman amplification
Inventors:
Donald G. Duff, Howard D. Kidorf, Xiaobing Ma, Karsten Rottwitt
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Mar 10, 1999
Inventors
Donald G. Duff
Howard D. Kidorf
Xiaobing Ma
Karsten Rottwitt
Assignee (at issue)
Tyco Telecommunications (US) Inc.
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.