Granted Patent
Utility
US 6,373,606 · App. 09/437,953
Optical demultiplexer
Inventor:
Kenichi Nakama
Patented Case
View Patent ↗
Granted: Apr 16, 2002
Filed: Nov 10, 1999
Inventor
Kenichi Nakama
Assignee (at issue)
NIPPON SHEET GLASS COMPANY, LIMITED
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.