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发明名称
Perfectionnements aux dispositifs de tubes à décharges d'électrons
摘要
申请公布号
FR678210(A)
申请公布日期
1930.03.20
申请号
FRD678210
申请日期
1929.07.09
申请人
WESTINGHOUSE LAMP COMPANY
发明人
分类号
H01J1/20;H01J19/02;H01J21/02
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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