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发明名称
Perfectionnements aux valves à décharge électronique
摘要
申请公布号
FR672920(A)
申请公布日期
1930.01.08
申请号
FRD672920
申请日期
1929.04.10
申请人
COMPAGNIE FRANCAISE POUR L'EXPLOITATION DES PROCEDES THOMSON-HOUSTON
发明人
分类号
H01J17/54
主分类号
H01J17/54
代理机构
代理人
主权项
地址
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