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经营范围
发明名称
Gaseous conduction apparatus
摘要
申请公布号
US1931299(A)
申请公布日期
1933.10.17
申请号
US19280301839
申请日期
1928.08.24
申请人
RAYTHEON, INC.
发明人
SPENCER PERCY L.
分类号
H01J17/40
主分类号
H01J17/40
代理机构
代理人
主权项
地址
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