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发明名称
Einrichtung zur Aufnahme und Wiedergabe von Tonfilmen.
摘要
申请公布号
AT124843(B)
申请公布日期
1931.10.10
申请号
ATD124843
申请日期
1930.04.22
申请人
ALLGEMEINE ELEKTRICITAETS-GESELLSCHAFT
发明人
分类号
主分类号
代理机构
代理人
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