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经营范围
发明名称
Polarity reverser
摘要
申请公布号
US2059283(A)
申请公布日期
1936.11.03
申请号
US19330669577
申请日期
1933.05.05
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
SAAR FRANZ
分类号
H01H21/58
主分类号
H01H21/58
代理机构
代理人
主权项
地址
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