Granted Patent
Utility
US 6,301,407 · App. 09/304,438
Dielectric optical filter network
Inventor:
Alan Donaldson
Patented Case
View Patent ↗
Granted: Oct 9, 2001
Filed: May 3, 1999
Inventor
Alan Donaldson
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.