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经营范围
发明名称
Perfectionnements aux systèmes amplificateurs électriques
摘要
申请公布号
FR683433(A)
申请公布日期
1930.06.12
申请号
FRD683433
申请日期
1929.10.17
申请人
COMPAGNIE FRANCAISE POUR L'EXPLOITATION DES PROCEDES THOMSON-HOUSTON
发明人
分类号
H03F1/50
主分类号
H03F1/50
代理机构
代理人
主权项
地址
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