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经营范围
发明名称
Folding step ladder
摘要
申请公布号
US2899009(A)
申请公布日期
1959.08.11
申请号
US19580756810
申请日期
1958.08.25
申请人
MILTON ROTH
发明人
ROTH MILTON
分类号
E06C1/12;E06C1/22
主分类号
E06C1/12
代理机构
代理人
主权项
地址
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