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发明名称
Switching means
摘要
申请公布号
US2217759(A)
申请公布日期
1940.10.15
申请号
US19380238529
申请日期
1938.11.03
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
MAHNKEN WERNER
分类号
H03J1/18
主分类号
H03J1/18
代理机构
代理人
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地址
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