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经营范围
发明名称
Improvements in or relating to electron amplifier discharge devices
摘要
申请公布号
GB478095(A)
申请公布日期
1938.01.12
申请号
GB19370005850
申请日期
1937.02.26
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J25/02;H01J25/04
主分类号
H01J25/02
代理机构
代理人
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地址
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