Granted Patent
Utility
US 6,504,454 · App. 09/913,052
Longitudinally coupled surface acoustic wave filter
Inventor:
Naoki Takahashi
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Aug 7, 2001
Inventor
Naoki Takahashi
Assignee (at issue)
Toyo Communication Equipment 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.