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经营范围
发明名称
THERMIONIC EMITTERS
摘要
申请公布号
GB1371089(A)
申请公布日期
1974.10.23
申请号
GB19710060831
申请日期
1971.12.30
申请人
ELECTRON EMISSION SYSTEMS INC
发明人
分类号
H01J9/04;(IPC1-7):H01J9/04;H01J1/14
主分类号
H01J9/04
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代理人
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