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发明名称
Grid electrode
摘要
申请公布号
US1957223(A)
申请公布日期
1934.05.01
申请号
US19280308293
申请日期
1928.09.25
申请人
GENERAL ELECTRIC COMPANY
发明人
MURPHY GEORGE F.
分类号
H01J19/38
主分类号
H01J19/38
代理机构
代理人
主权项
地址
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