Granted Patent
Utility
US 5,498,920 · App. 08/238,653
Acoustic wave device and process for producing same
Inventors:
Hiroshi Okano, Naoki Tanaka, Kenichi Shibata, Yusuke Takahashi
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: May 5, 1994
Inventors
Hiroshi Okano
Naoki Tanaka
Kenichi Shibata
Yusuke Takahashi
Assignee (at issue)
SANYO ELECTRIC CO., 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.