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经营范围
发明名称
Perfectionnements aux lampes à culot en matière céramique
摘要
申请公布号
FR842851(A)
申请公布日期
1939.06.21
申请号
FRD842851
申请日期
1938.09.01
申请人
TELEFUNKEN GESELLSCHAFT FU:R DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H01J5/54;H01J19/66
主分类号
H01J5/54
代理机构
代理人
主权项
地址
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