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发明名称
Amplifier control
摘要
申请公布号
US1946607(A)
申请公布日期
1934.02.13
申请号
US19310543424
申请日期
1931.06.10
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
AFFEL HERMAN A.;GREEN ESTILL I.
分类号
H03F1/54
主分类号
H03F1/54
代理机构
代理人
主权项
地址
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