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经营范围
发明名称
Improvements in or relating to thermionic valve circuit arrangements
摘要
申请公布号
GB427709(A)
申请公布日期
1935.04.23
申请号
GB19330020864
申请日期
1933.07.24
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H03F1/36;H04B1/16
主分类号
H03F1/36
代理机构
代理人
主权项
地址
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