发明授权
- 专利标题： Frequency selector apparatus
- 专利标题（中）： 频率选择装置
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申请号： US74626申请日： 1979-09-12
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公开(公告)号： US4254388A公开(公告)日： 1981-03-03
- 发明人: Nobuo Mikoshiba , Shoichi Minagawa , Takeshi Okamoto
- 申请人： Nobuo Mikoshiba , Shoichi Minagawa , Takeshi Okamoto
- 申请人地址： JPX Tokyo
- 专利权人： Clarion Co., Ltd.
- 当前专利权人： Clarion Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX53-117010 19780922
- 主分类号： H03H9/25
- IPC分类号： H03H9/25 ; G10K11/36 ; H03F7/04 ; H03F13/00 ; H03H3/08 ; H03H9/145 ; H01L41/04 ; H01L27/20 ; H03H9/64
摘要：
A frequency selector apparatus wherein unidirectional input and output surface-acoustic-wave transducers are provided in an acoustic wave propagation path formed on a piezoelectric device and reflecting electrodes, to which a.c. signals are applied respectively, are disposed in the acoustic wave propagation path on opposite sides of the transducers and adjacent thereto.
公开/授权文献
- USD393053S Faucet body and spout 公开/授权日：1998-03-31
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