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经营范围
发明名称
Stepladder
摘要
申请公布号
US2643045(A)
申请公布日期
1953.06.23
申请号
US19510221167
申请日期
1951.04.16
申请人
RENFRO JULIAN M
发明人
RENFRO JULIAN M.
分类号
E06C1/38
主分类号
E06C1/38
代理机构
代理人
主权项
地址
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