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发明名称
Paper roll phonograph record
摘要
申请公布号
US1871761(A)
申请公布日期
1932.08.16
申请号
US19250065131
申请日期
1925.10.27
申请人
RADIO CORPORATION OF AMERICA
发明人
WEINBERGER JULIUS
分类号
G11B3/00
主分类号
G11B3/00
代理机构
代理人
主权项
地址
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