Granted Patent
Utility
US 6,400,859 · App. 09/339,253
Optical ring protection having matched nodes and alternate secondary path
Inventors:
Evert de Boer, Peter Phelps, Louis Pare, David Steele, Stephen James Wilson
Patented Case
View Patent ↗
Granted: Jun 4, 2002
Filed: Jun 24, 1999
Inventors
Evert de Boer
Peter Phelps
Louis Pare
David Steele
Stephen James Wilson
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.