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经营范围
发明名称
Procédé et dispositif pour l'enregistrement et la reproduction des sons
摘要
申请公布号
FR1007289(A)
申请公布日期
1952.05.05
申请号
FRD1007289
申请日期
1948.03.16
申请人
发明人
HOPPE HANS
分类号
G11B7/003
主分类号
G11B7/003
代理机构
代理人
主权项
地址
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