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经营范围
发明名称
Vorrichtung zur Aufnahme und Wiedergabe von Tonfilmen.
摘要
申请公布号
CH148181(A)
申请公布日期
1931.07.15
申请号
CHD148181
申请日期
1930.04.24
申请人
ALLGEMEINE ELEKTRICITAETS-GESELLSCHAFT
发明人
ELEKTRICITAETS-GESELLSCHAFT ALLGEMEINE
分类号
主分类号
代理机构
代理人
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