Granted Patent
Utility
US 5,157,747 · App. 07/643,886
Photorefractive optical fiber
Inventors:
Robert M. Aktins, Katherine Theresa Nelson, Kenneth L. Walker
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Jan 18, 1991
Inventors
Robert M. Aktins
Katherine Theresa Nelson
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.