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发明名称
Electron discharge device
摘要
申请公布号
US2213551(A)
申请公布日期
1940.09.03
申请号
US19370133298
申请日期
1937.03.27
申请人
RADIO CORPORATION OF AMERICA
发明人
NELSON HERBERT
分类号
H01J17/30;H01J19/42
主分类号
H01J17/30
代理机构
代理人
主权项
地址
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