Granted Patent
Utility
US 6,509,987 · App. 09/371,165
Channel band conversion apparatus for optical transmission systems
Inventors:
Guido Hunziker, Stan Lumish, Jianhui Zhou
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Aug 10, 1999
Inventors
Guido Hunziker
Stan Lumish
Jianhui Zhou
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.