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发明名称
Electroacoustical apparatus
摘要
申请公布号
US2113364(A)
申请公布日期
1938.04.05
申请号
US19360077142
申请日期
1936.04.30
申请人
RADIO CORPORATION OF AMERICA
发明人
ANDERSON LESLIE J.
分类号
H04R9/08
主分类号
H04R9/08
代理机构
代理人
主权项
地址
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