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经营范围
发明名称
Perfectionnements apportés aux procédés pour enregistrer la voix humaine
摘要
申请公布号
FR694334(A)
申请公布日期
1930.12.02
申请号
FRD694334
申请日期
1930.04.23
申请人
N. V. KUCHENMEISTER'S INTERNATIONALE ULTRAPHOON MAATSCHAPPIJ
发明人
分类号
G07F17/30
主分类号
G07F17/30
代理机构
代理人
主权项
地址
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