Granted Patent
Utility
US 6,594,413 · App. 09/750,871
Optical switching device
Inventors:
Adrian Sparks, Frederick James Lalonde, Peter David Roorda
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Dec 28, 2000
Inventors
Adrian Sparks
Frederick James Lalonde
Peter David Roorda
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.