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经营范围
发明名称
Electrical amplifier
摘要
申请公布号
US2429124(A)
申请公布日期
1947.10.14
申请号
US19440530589
申请日期
1944.04.12
申请人
ARMA CORPORATION
发明人
CUNNINGHAM FREDERICK W.
分类号
H03F1/36
主分类号
H03F1/36
代理机构
代理人
主权项
地址
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