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发明名称
Recording method and system
摘要
申请公布号
US1967072(A)
申请公布日期
1934.07.17
申请号
US19320614077
申请日期
1932.05.28
申请人
RADIO CORPORATION OF AMERICA
发明人
YOUNG CHARLES J.
分类号
G04D7/12
主分类号
G04D7/12
代理机构
代理人
主权项
地址
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