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发明名称
SECONDARY EMISSION ELECTRODE
摘要
申请公布号
CA393938(A)
申请公布日期
1941.01.14
申请号
CAD393938
申请日期
申请人
FARNSWORTH TELEVISION INCORPORATED
发明人
PHILO T. FARNSWORTH
分类号
主分类号
代理机构
代理人
主权项
地址
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