Granted Patent
Utility
US 5,074,633 · App. 07/562,768
Optical communication system comprising a fiber amplifier
Inventors:
Leonard G. Cohen, John T. Krause, William Alfred Reed, Kenneth L. Walker
Patented Case
View Patent ↗
Granted: Dec 24, 1991
Filed: Aug 3, 1990
Inventors
Leonard G. Cohen
John T. Krause
William Alfred Reed
Kenneth L. Walker
Assignee (at issue)
AT&T Bell Laboratories
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.