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发明名称
Screen apparatus
摘要
申请公布号
US2643586(A)
申请公布日期
1953.06.30
申请号
US19510226674
申请日期
1951.05.16
申请人
COLVIN JULIUS J
发明人
COLVIN JULIUS J.
分类号
D21D5/04
主分类号
D21D5/04
代理机构
代理人
主权项
地址
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