Granted Patent
Utility
US 5,991,989 · App. 09/037,103
Method of manufacture of surface acoustic wave device
Inventors:
Keiji Onishi, Shun-ichi Seki, Yutaka Taguchi, Kazuo Eda
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Mar 9, 1998
Inventors
Keiji Onishi
Shun-ichi Seki
Yutaka Taguchi
Kazuo Eda
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.