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发明名称
Ferrofluid centered voice coil speaker
摘要
申请公布号
EP1819194(A3)
申请公布日期
2009.12.23
申请号
EP20070002539
申请日期
2007.02.06
申请人
FERROTEC CORPORATION
发明人
TSUDA, SHIRO;ROSENSWEIG, RONALD E.
分类号
H04R9/04
主分类号
H04R9/04
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代理人
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