Granted Patent
Utility
US 6,163,643 · App. 09/133,278
Micro-mechanical variable optical attenuator
Inventors:
Ernest Eisenhardt Bergmann, David J. Bishop
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: Aug 12, 1998
Inventors
Ernest Eisenhardt Bergmann
David J. Bishop
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.