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发明名称
Folding bleachers
摘要
申请公布号
US3001243(A)
申请公布日期
1961.09.26
申请号
US19570663831
申请日期
1957.06.05
申请人
BARBER-COLMAN COMPANY
发明人
CONN ALFRED J.;WIKELUND HAROLD N.
分类号
E04H3/12
主分类号
E04H3/12
代理机构
代理人
主权项
地址
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