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经营范围
发明名称
AMPLIFIER CIRCUITS
摘要
申请公布号
CA474410(A)
申请公布日期
1951.06.12
申请号
CAD474410
申请日期
申请人
ELECTRIC AND MUSICAL INDUSTRIES LIMITED
发明人
HUGH LYON MANSFORD
分类号
主分类号
代理机构
代理人
主权项
地址
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