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发明名称
ELECTRON DISCHARGE DEVICE
摘要
申请公布号
CA349829(A)
申请公布日期
1935.04.23
申请号
CAD349829
申请日期
申请人
THE ROGERS RADIO TUBES LIMITED
发明人
HENRY W. PARKER
分类号
主分类号
代理机构
代理人
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地址
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