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发明名称
Stepladder
摘要
申请公布号
US2521386(A)
申请公布日期
1950.09.05
申请号
US19490097441
申请日期
1949.06.06
申请人
GEORGE MASON HARRY
发明人
MASON HARRY GEORGE
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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