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经营范围
发明名称
Klingfreie Gluehkathode fuer Elektronenroehren
摘要
申请公布号
DE587216(C)
申请公布日期
1933.10.31
申请号
DED587216
申请日期
1930.03.27
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J1/18;H01J21/16
主分类号
H01J1/18
代理机构
代理人
主权项
地址
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