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经营范围
发明名称
Stepladder
摘要
申请公布号
US2573665(A)
申请公布日期
1951.10.30
申请号
US19460662115
申请日期
1946.04.15
申请人
JONES CLARENCE F
发明人
JONES CLARENCE F.
分类号
E06C1/39
主分类号
E06C1/39
代理机构
代理人
主权项
地址
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