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发明名称
Electron discharge device
摘要
申请公布号
US2159765(A)
申请公布日期
1939.05.23
申请号
US19380210328
申请日期
1938.05.27
申请人
N. V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
JONKER JOHAN LODEWIJK HENDRIK;GALL BERNARDUS OCTAVIANUS MARIA
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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