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发明名称
Electrode composition for electron-discharge devices
摘要
申请公布号
US1747062(A)
申请公布日期
1930.02.11
申请号
US19230648876
申请日期
1923.07.02
申请人
GENERAL ELECTRIC COMPANY
发明人
DUSHMAN SAUL
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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