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发明名称
SECONDARY-EMISSION ELECTRODE OF DISCHARGE TUBE
摘要
申请公布号
IE15826(L)
申请公布日期
1939.02.07
申请号
IED15826
申请日期
1938.08.08
申请人
N.V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
分类号
H01J1/32;(IPC1-7):H01J1/32
主分类号
H01J1/32
代理机构
代理人
主权项
地址
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