Granted Patent
Utility
US 5,467,418 · App. 08/300,005
Frequency routing device having a spatially filtered optical grating for providing an increased passband width
Inventor:
Corrado Dragone
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Sep 2, 1994
Inventor
Corrado Dragone
Assignee (at issue)
AT & T IPM Corp.
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.