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发明名称
Verfahren und Apparat zur photographischen Registrierung von Tonwellen auf einem Tonträger.
摘要
申请公布号
CH164582(A)
申请公布日期
1933.10.15
申请号
CHD164582
申请日期
1931.10.31
申请人
RADIO CORPORATION OF AMERICA
发明人
AMERICA RADIO CORPORATION OF
分类号
主分类号
代理机构
代理人
主权项
地址
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