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发明名称
Système de lampes amplificatrices ayant un facteur d'amplification résultant indépendant de la tension de grille
摘要
申请公布号
FR852931(A)
申请公布日期
1940.03.06
申请号
FRD852931
申请日期
1939.04.12
申请人
TELEFUNKEN GESELLSCHAFT FU:R DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J21/02
主分类号
H01J21/02
代理机构
代理人
主权项
地址
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