Granted Patent
Utility
US 6,049,640 · App. 08/923,304
Wavelength-division-multiplexing cross-connect using angular dispersive elements and phase shifters
Inventor:
Christopher Doerr
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Sep 4, 1997
Inventor
Christopher Doerr
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.