Granted Patent
Utility
US 5,488,680 · App. 08/295,445
Frequency routing device having a wide and substantially flat passband
Inventor:
Corrado Dragone
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: Aug 24, 1994
Inventor
Corrado Dragone
Assignee (at issue)
AT&T 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.