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发明名称
Sealed-coil type vibratory magnet loudspeaker
摘要
申请公布号
US2492255(A)
申请公布日期
1949.12.27
申请号
US19440569854
申请日期
1944.12.26
申请人
ANGEHRN JOHN O
发明人
ANGEHRN JOHN O.
分类号
H04R11/02
主分类号
H04R11/02
代理机构
代理人
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地址
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