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发明名称
Convertible stepstool
摘要
申请公布号
US2990005(A)
申请公布日期
1961.06.27
申请号
US19590836121
申请日期
1959.08.26
申请人
KEMPH JAMES E
发明人
KEMPH JAMES E.
分类号
A47C12/02
主分类号
A47C12/02
代理机构
代理人
主权项
地址
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