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经营范围
发明名称
Electron tube cathodes
摘要
申请公布号
US3018404(A)
申请公布日期
1962.01.23
申请号
US19580724283
申请日期
1958.03.27
申请人
RAYTHEON COMPANY
发明人
DUDLEY KENNETH W.;APELBAUM JOSEPH H.
分类号
H01J23/05
主分类号
H01J23/05
代理机构
代理人
主权项
地址
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