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经营范围
发明名称
Perfectionnement à la fabrication des bandes magnétiques portant un enregistrementsonore
摘要
申请公布号
FR1008218(A)
申请公布日期
1952.05.15
申请号
FRD1008218
申请日期
1950.01.11
申请人
发明人
PERREAU HENRY
分类号
G11B5/845
主分类号
G11B5/845
代理机构
代理人
主权项
地址
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