Granted Patent
Utility
US 5,226,049 · App. 07/832,006
Optical fiber rare earth ion upconversion laser system
Inventor:
Stephen G. Grubb
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Feb 6, 1992
Inventor
Stephen G. Grubb
Assignee (at issue)
Amoco 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.