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发明名称
Electron discharge device
摘要
申请公布号
US2325664(A)
申请公布日期
1943.08.03
申请号
US19410421287
申请日期
1941.12.02
申请人
HENNY COHN
发明人
COHN HENNY
分类号
H01J21/02
主分类号
H01J21/02
代理机构
代理人
主权项
地址
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