Granted Patent
Utility
US 5,936,488 · App. 08/788,527
Surface acoustic wave filter having input and output transducers with different aperture lengths
Inventors:
Yutaka Taguchi, Kazuo Eda, Shunichi Seki, Keiji Onishi
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Jan 24, 1997
Inventors
Yutaka Taguchi
Kazuo Eda
Shunichi Seki
Keiji Onishi
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.