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发明名称
Stem for electron discharge devices
摘要
申请公布号
US2151809(A)
申请公布日期
1939.03.28
申请号
US19370165677
申请日期
1937.09.25
申请人
RADIO CORPORATION OF AMERICA
发明人
SHARDLOW LAWRENCE R.
分类号
H01J5/40
主分类号
H01J5/40
代理机构
代理人
主权项
地址
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