Granted Patent
Utility
US 6,380,827 · App. 09/589,360
Surface acoustic wave filter and branching filter utilizing it
Inventor:
Kazushige Noguchi
Patented Case
View Patent ↗
Granted: Apr 30, 2002
Filed: Jun 8, 2000
Inventor
Kazushige Noguchi
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.