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发明名称
Electron discharge device
摘要
申请公布号
US1882449(A)
申请公布日期
1932.10.11
申请号
US19290334346
申请日期
1929.01.22
申请人
RUBEN TUBE COMPANY
发明人
RUBEN SAMUEL
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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