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发明名称
Electron emitting element for electron gun
摘要
申请公布号
US3197669(A)
申请公布日期
1965.07.27
申请号
US19610112084
申请日期
1961.05.23
申请人
WELDING RESEARCH, INC.
发明人
SOLOMON JULIUS LEE
分类号
H01J37/02;H01J37/065;H01J37/067;H01J37/07
主分类号
H01J37/02
代理机构
代理人
主权项
地址
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