Granted Patent
Utility
US 6,535,481 · App. 09/378,141
Network data routing protection cycles for automatic protection switching
Inventors:
Loa Andersson, Kent Felske, Guo-Qiang Wang
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Aug 20, 1999
Inventors
Loa Andersson
Kent Felske
Guo-Qiang Wang
Assignee (at issue)
Nortel Networks Limited
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.