Granted Patent
Utility
US 6,236,498 · App. 09/252,713
Upgradable, gain flattened fiber amplifiers for WDM applications
Inventors:
Paul N. Freeman, Stephen G. Grubb, Daniel Ratoff, David G. Mehuys
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Feb 19, 1999
Inventors
Paul N. Freeman
Stephen G. Grubb
Daniel Ratoff
David G. Mehuys
Assignee (at issue)
SDL Limited
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.