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经营范围
发明名称
Gaseous discharge tube
摘要
申请公布号
US2171215(A)
申请公布日期
1939.08.29
申请号
US19370147852
申请日期
1937.06.12
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
KAUFFELDT ALFONS
分类号
H01J7/44
主分类号
H01J7/44
代理机构
代理人
主权项
地址
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