Granted Patent
Utility
US 6,654,923 · App. 09/392,455
ATM group protection switching method and apparatus
Inventors:
Guy L Grenier, Bruce D. Keats
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Sep 9, 1999
Inventors
Guy L Grenier
Bruce D. Keats
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.