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发明名称
SOUND RECORDING APPARATUS
摘要
申请公布号
CA471206(A)
申请公布日期
1951.01.30
申请号
CAD471206
申请日期
申请人
RADIO CORPORATION OF AMERICA
发明人
HILLEL ISAAC REISKIND
分类号
主分类号
代理机构
代理人
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