Granted Patent
Utility
US 6,785,304 · App. 09/912,214
Waveguide device with mode control and pump light confinement and method of using same
Inventor:
David M. Filgas
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Jul 24, 2001
Inventor
David M. Filgas
Assignee (at issue)
GSI LUMONICS CORPORATION
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.