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发明名称
Electron device
摘要
申请公布号
US2243102(A)
申请公布日期
1941.05.27
申请号
US19380203752
申请日期
1938.04.23
申请人
ELECTRIC & MUSICAL INDUSTRIES LIMITED
发明人
KLEMPERER OTTO
分类号
H01J29/60
主分类号
H01J29/60
代理机构
代理人
主权项
地址
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