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经营范围
发明名称
Electroacoustic transducer
摘要
申请公布号
EP1450578(A3)
申请公布日期
2008.05.07
申请号
EP20040250722
申请日期
2004.02.11
申请人
ALPS ELECTRIC CO., LTD.
发明人
SUZUKI, KATSUTOSHI
分类号
H04R7/18;H04R7/20;H04R1/28;H04R7/04
主分类号
H04R7/18
代理机构
代理人
主权项
地址
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