Granted Patent
Utility
US 5,698,471 · App. 08/646,451
Method of manufacturing a composite substrate and a piezoelectric device using the substrate
Inventors:
Akihiko Namba, Tetsuyoshi Ogura, Yoshihiro Tomita, Kazuo Eda
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: May 7, 1996
Inventors
Akihiko Namba
Tetsuyoshi Ogura
Yoshihiro Tomita
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.