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发明名称
Electroacoustic device
摘要
申请公布号
US2064316(A)
申请公布日期
1936.12.15
申请号
US19320647132
申请日期
1932.12.14
申请人
RADIO CORPORATION OF AMERICA
发明人
OLSON HARRY F.;MASSA FRANK
分类号
H04R9/08
主分类号
H04R9/08
代理机构
代理人
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地址
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