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发明名称
Dispositif pour l'enregistrement et la reproduction de films sonores
摘要
申请公布号
FR821987(A)
申请公布日期
1937.12.17
申请号
FRD821987
申请日期
1937.05.19
申请人
I. G. FARBENINDUSTRIE AKTIENGESELLSCHAFT
发明人
分类号
G11B15/50
主分类号
G11B15/50
代理机构
代理人
主权项
地址
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