Granted Patent
Utility
US 6,407,842 · App. 09/181,194
Method and apparatus for transmitting a WDM optical signal having nonuniform channel spacings
Inventor:
Xiaobing Ma
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Oct 28, 1998
Inventor
Xiaobing Ma
Assignee (at issue)
Tycom (US) 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.