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经营范围
发明名称
Electron discharge tube
摘要
申请公布号
US2419544(A)
申请公布日期
1947.04.29
申请号
US19420445509
申请日期
1942.06.02
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
FOSTER JOHN
分类号
H01J21/36
主分类号
H01J21/36
代理机构
代理人
主权项
地址
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