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发明名称
Electron discharge device
摘要
申请公布号
US2271985(A)
申请公布日期
1942.02.03
申请号
US19390292971
申请日期
1939.09.01
申请人
RADIO CORPORATION
发明人
MORTON GEORGE ASHMUN
分类号
H01J29/84;H01J43/08
主分类号
H01J29/84
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代理人
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