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发明名称
DEVICE HAVING MATCHED ACCOUSTICAL IMPEDANCE AND METHOD
摘要
申请公布号
EP1600031(A4)
申请公布日期
2009.04.08
申请号
EP20040717511
申请日期
2004.03.04
申请人
JONES, JOIE P.
发明人
JONES, JOIE P.
分类号
G10K11/02;B06B1/06;G01N29/00;H02N2/00;H04R;H04R1/00
主分类号
G10K11/02
代理机构
代理人
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地址
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