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经营范围
发明名称
Amplificateur d'ondes électriques à réaction négative.
摘要
申请公布号
CH270143(A)
申请公布日期
1950.08.15
申请号
CHD270143
申请日期
1947.03.19
申请人
STANDARD TELEPHONE ET RADIO S. A.
发明人
STANDARD TELEPHONE ET RADIO S. A.
分类号
H03F1/36;H03F1/54
主分类号
H03F1/36
代理机构
代理人
主权项
地址
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