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经营范围
发明名称
Improvements in or relating to electron discharge tubes
摘要
申请公布号
GB606147(A)
申请公布日期
1948.08.06
申请号
GB19450032128
申请日期
1945.11.28
申请人
GERHARD LIEBMANN;CATHODEON LIMITED
发明人
分类号
H01J3/02;H01J29/48
主分类号
H01J3/02
代理机构
代理人
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地址
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