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发明名称
Centering device for beams of cathode-ray tubes
摘要
申请公布号
US2544898(A)
申请公布日期
1951.03.13
申请号
US19490136294
申请日期
1949.12.31
申请人
GUARDIAN ELECTRIC MANUFACTURING CO.
发明人
OBSZARNY THEDORE;SCHMIDT JOHN
分类号
H01J29/54
主分类号
H01J29/54
代理机构
代理人
主权项
地址
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