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发明名称
Electron discharge device
摘要
申请公布号
US2171226(A)
申请公布日期
1939.08.29
申请号
US19370175595
申请日期
1937.11.20
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
SCHOONENBERG PANCRAS
分类号
H01J5/24
主分类号
H01J5/24
代理机构
代理人
主权项
地址
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