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发明名称
Electron emitter
摘要
申请公布号
US2175696(A)
申请公布日期
1939.10.10
申请号
US19370145050
申请日期
1937.05.27
申请人
RADIO CORPORATION OF AMERICA
发明人
LEDERER ERNEST A.
分类号
H01J9/04;H01J9/12
主分类号
H01J9/04
代理机构
代理人
主权项
地址
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