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发明名称
Door closer
摘要
申请公布号
US2544252(A)
申请公布日期
1951.03.06
申请号
US19490090530
申请日期
1949.04.29
申请人
GEORGE W. HOULSBY, JR.
发明人
CARLSON MARTIN
分类号
E05F3/00
主分类号
E05F3/00
代理机构
代理人
主权项
地址
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