Granted Patent
Utility
US 6,040,938 · App. 08/923,584
Semiconductor optical amplifier
Inventor:
Thomas Ducellier
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: Sep 4, 1997
Inventor
Thomas Ducellier
Assignee (at issue)
ALCATEL
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.