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经营范围
发明名称
Collapsible ladder
摘要
申请公布号
US3025923(A)
申请公布日期
1962.03.20
申请号
US19610085624
申请日期
1961.01.30
申请人
EDWARD MIRMAN
发明人
BURNSTEIN HARRY
分类号
E06C9/08
主分类号
E06C9/08
代理机构
代理人
主权项
地址
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