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经营范围
发明名称
Procédé et dispositif pour l'enregistrement des sons sur films ou autres surfaces
摘要
申请公布号
FR687523(A)
申请公布日期
1930.08.09
申请号
FRD687523
申请日期
1929.03.22
申请人
发明人
HUGUENARD EUGENE-ALEXANDRE
分类号
G11B3/00
主分类号
G11B3/00
代理机构
代理人
主权项
地址
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