Granted Patent
Utility
US 5,731,887 · App. 08/577,663
System and method for photonic facility and line protection switching
Inventor:
John A. Fee
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: Dec 22, 1995
Inventor
John A. Fee
Assignee (at issue)
MCI Communications 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.