Granted Patent
Utility
US 5,663,697 · App. 08/635,678
Surface accoustic wave filter
Inventors:
Yasumi Kobayashi, Kuniyuki Matsui, Yasuhiro Hirao, Kousuke Takeuchi, Hiroshi Kayaki, Yusuke Takahashi, Toshiharu Tanaka, Isao Kiyose, Kenichi Shibata
Patented Case
View Patent ↗
Granted: Sep 2, 1997
Filed: Apr 22, 1996
Inventors
Yasumi Kobayashi
Kuniyuki Matsui
Yasuhiro Hirao
Kousuke Takeuchi
Hiroshi Kayaki
Yusuke Takahashi
Toshiharu Tanaka
Isao Kiyose
Kenichi Shibata
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.