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发明名称
Thermionic cathode and process of activation
摘要
申请公布号
US2069407(A)
申请公布日期
1937.02.02
申请号
US19300471599
申请日期
1930.07.29
申请人
GENERAL ELECTRIC COMPANY
发明人
FONDA GORTON R.
分类号
H01J9/04
主分类号
H01J9/04
代理机构
代理人
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地址
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