Granted Patent
Utility
US 6,539,149 · App. 09/399,575
Waveguide grating router employing transmissive Echelle gratings
Inventors:
Giovanni Barbarossa, Leonard G. Cohen, Yuan Li, Yan Wang
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Sep 20, 1999
Inventors
Giovanni Barbarossa
Leonard G. Cohen
Yuan Li
Yan Wang
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.