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经营范围
发明名称
Système à électrodes pour tubes à décharge
摘要
申请公布号
FR774850(A)
申请公布日期
1934.12.14
申请号
FRD774850
申请日期
1934.06.22
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J19/28
主分类号
H01J19/28
代理机构
代理人
主权项
地址
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