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发明名称
Electron discharge device
摘要
申请公布号
US2013093(A)
申请公布日期
1935.09.03
申请号
US19300454533
申请日期
1930.05.22
申请人
RADIO CORPORATION OF AMERICA
发明人
FRANTZ SAMUEL G.
分类号
H01J21/18
主分类号
H01J21/18
代理机构
代理人
主权项
地址
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