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发明名称
Improvements in or relating to thermionic cathodes
摘要
申请公布号
GB686578(A)
申请公布日期
1953.01.28
申请号
GB19510003100
申请日期
1951.02.08
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
ROGERS DOUGLAS CECIL;MARSH WALTER WARWICK
分类号
H01J21/20
主分类号
H01J21/20
代理机构
代理人
主权项
地址
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