Granted Patent
Utility
US 6,377,389 · App. 09/544,486
Optical signal varying devices
Inventors:
Stephen G. Grubb, Raymond Zanoni, Thomas D. Stephens
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Apr 7, 2000
Inventors
Stephen G. Grubb
Raymond Zanoni
Thomas D. Stephens
Assignee (at issue)
Corvis Corporation
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.