Granted Patent
Utility
US 5,225,925 · App. 07/735,387
Sensitized erbium fiber optical amplifier and source
Inventors:
Stephen G. Grubb, Douglas W. Anthon, William L. Barnes, Janet E. Townsend
Patented Case
View Patent ↗
Granted: Jul 6, 1993
Filed: Jul 24, 1991
Inventors
Stephen G. Grubb
Douglas W. Anthon
William L. Barnes
Janet E. Townsend
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.