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发明名称
AMPLIFYING APPARATUS
摘要
申请公布号
CA299540(A)
申请公布日期
1930.04.22
申请号
CAD299540
申请日期
申请人
THE CANADIAN GENERAL ELECTRIC COMPANY
发明人
BROWDER J. THOMPSON
分类号
主分类号
代理机构
代理人
主权项
地址
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