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经营范围
发明名称
Sound film splice
摘要
申请公布号
US2183947(A)
申请公布日期
1939.12.19
申请号
US19380205284
申请日期
1938.04.30
申请人
RADIO CORPORATION OF AMERICA
发明人
SUMNER RAYMOND S.
分类号
G11B27/06
主分类号
G11B27/06
代理机构
代理人
主权项
地址
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