Granted Patent
Utility
US 5,721,519 · App. 08/517,577
Balanced type surface acoustic wave device
Inventors:
Keiji Onishi, Kazuo Eda, Yutaka Taguchi, Shunichi Seki
Patented Case
View Patent ↗
Granted: Feb 24, 1998
Filed: Aug 21, 1995
Inventors
Keiji Onishi
Kazuo Eda
Yutaka Taguchi
Shunichi Seki
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.