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经营范围
发明名称
Indirekt geheizte, dunkelemittierende Kathode.
摘要
申请公布号
AT151497(B)
申请公布日期
1937.11.10
申请号
ATD151497
申请日期
1935.01.16
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
分类号
H01J1/20
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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