Granted Patent
Utility
US 6,690,848 · App. 09/893,498
Metropolitan photonic switch
Inventors:
Alan Graves, George Irwin, John Watkins
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Jun 29, 2001
Inventors
Alan Graves
George Irwin
John Watkins
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.