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经营范围
发明名称
Improvements in or relating to thermionic valve and like circuit arrangements
摘要
申请公布号
GB428285(A)
申请公布日期
1935.05.10
申请号
GB19330027925
申请日期
1933.10.10
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
H03G3/22;H04B1/16
主分类号
H03G3/22
代理机构
代理人
主权项
地址
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