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发明名称
Vacuum tube
摘要
申请公布号
US1921619(A)
申请公布日期
1933.08.08
申请号
US19280279595
申请日期
1928.05.21
申请人
THE SPARKS-WITHINGTON COMPANY
发明人
KAYKO CHARLES J.
分类号
H01J1/20
主分类号
H01J1/20
代理机构
代理人
主权项
地址
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