Granted Patent
Utility
US 6,445,720 · App. 09/267,386
Optical output level control device for an optical wavelength multiplexer included in an optical transmission system
Inventor:
Toshiaki Mukojima
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Mar 15, 1999
Inventor
Toshiaki Mukojima
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.