Granted Patent
Utility
US 6,003,222 · App. 08/891,439
Manufacture of tapered waveguides
Inventor:
Giovanni Barbarossa
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Jul 10, 1997
Inventor
Giovanni Barbarossa
Assignee (at issue)
LUCENT TECHNOLOGIES INC.
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.