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经营范围
发明名称
Stepladder
摘要
申请公布号
US2146020(A)
申请公布日期
1939.02.07
申请号
US19370141455
申请日期
1937.05.08
申请人
MICHIGAN LADDER COMPANY
发明人
LEWIS MELVIN J.
分类号
E06C1/393
主分类号
E06C1/393
代理机构
代理人
主权项
地址
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