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发明名称
METAL RADIO TUBE
摘要
申请公布号
CA360790(A)
申请公布日期
1936.09.29
申请号
CAD360790
申请日期
申请人
THE CANADIAN GENERAL ELECTRIC COMPANY
发明人
GEORGE F. METCALF
分类号
主分类号
代理机构
代理人
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地址
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