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经营范围
发明名称
Electron tube
摘要
申请公布号
US2110553(A)
申请公布日期
1938.03.08
申请号
US19340738432
申请日期
1934.08.04
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
KNOLL MAX
分类号
H01J29/56
主分类号
H01J29/56
代理机构
代理人
主权项
地址
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