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发明名称
Control for electron tubes
摘要
申请公布号
US1887766(A)
申请公布日期
1932.11.15
申请号
US19290399142
申请日期
1929.10.12
申请人
CUTLER-HAMMER, INC.
发明人
VAN JAMES D. LE
分类号
H01J17/04
主分类号
H01J17/04
代理机构
代理人
主权项
地址
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