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经营范围
发明名称
Perfectionnements aux systèmes de reproduction de sons
摘要
申请公布号
FR40499(E)
申请公布日期
1932.07.01
申请号
FRD40499
申请日期
1931.07.16
申请人
COMPAGNIE FRANCAISE POUR L'EXPLOITATION DES PROCEDES THOMSON-HOUSTON
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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