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经营范围
发明名称
High-frequency tube structure
摘要
申请公布号
US2537112(A)
申请公布日期
1951.01.09
申请号
US19450611636
申请日期
1945.08.20
申请人
THE SPERRY CORPORATION
发明人
WOODYARD JOHN R.
分类号
H01J25/24;H01J25/52;H03C3/30
主分类号
H01J25/24
代理机构
代理人
主权项
地址
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