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经营范围
发明名称
Procédé pour l'obtention d'enregistrements sonores
摘要
申请公布号
FR840530(A)
申请公布日期
1939.04.27
申请号
FRD840530
申请日期
1938.07.09
申请人
ALLGEMEINE ELEKTRICITATS-GESELLSCHAFT
发明人
分类号
G11B5/02
主分类号
G11B5/02
代理机构
代理人
主权项
地址
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