Granted Patent
Utility
US 6,426,583 · App. 09/587,938
Surface acoustic wave element, method for producing the same and surface acoustic wave device using the same
Inventors:
Keiji Onishi, Hiroki Sato, Yoshihiro Tomita
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Jun 6, 2000
Inventors
Keiji Onishi
Hiroki Sato
Yoshihiro Tomita
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.