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经营范围
发明名称
Amplifying circuit
摘要
申请公布号
US2243907(A)
申请公布日期
1941.06.03
申请号
US19400314781
申请日期
1940.01.20
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
JOHANSSON SVEN G.
分类号
H04B1/16
主分类号
H04B1/16
代理机构
代理人
主权项
地址
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