Granted Patent
Utility
US 5,506,552 · App. 08/334,673
Surface acoustic wave filter with multiple ground terminals
Inventors:
Shun-ichi Seki, Kazuo Eda, Yutaka Taguchi, Keiji Onishi
Patented Case
View Patent ↗
Granted: Apr 9, 1996
Filed: Nov 4, 1994
Inventors
Shun-ichi Seki
Kazuo Eda
Yutaka Taguchi
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.