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经营范围
发明名称
Tonfilm- oder Bildtonfilmgeraet
摘要
申请公布号
DE751613(C)
申请公布日期
1953.03.23
申请号
DE1933R087654D
申请日期
1933.04.01
申请人
RADIO CORPORATION OF AMERICA
发明人
分类号
G03B31/02
主分类号
G03B31/02
代理机构
代理人
主权项
地址
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