Granted Patent
Utility
US 6,323,975 · App. 09/435,747
Optical add/drop device
Inventor:
Jouko Kurki
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Nov 8, 1999
Inventor
Jouko Kurki
Assignee (at issue)
Nokia Networks Oy
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.