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经营范围
发明名称
Neutralized amplifier
摘要
申请公布号
US2207788(A)
申请公布日期
1940.07.16
申请号
US19370177425
申请日期
1937.12.01
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
EICHHOLZ BRUNO
分类号
H03F1/16
主分类号
H03F1/16
代理机构
代理人
主权项
地址
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