Granted Patent
Utility
US 6,625,340 · App. 09/474,544
Optical switch attenuator
Inventors:
Adrian Sparks, Robert Spagnoletti, Gordon D Henshall
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Dec 29, 1999
Inventors
Adrian Sparks
Robert Spagnoletti
Gordon D Henshall
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.