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经营范围
发明名称
Stepladder
摘要
申请公布号
US3292735(A)
申请公布日期
1966.12.20
申请号
US19640389099
申请日期
1964.08.12
申请人
UTLEY ROBERT R
发明人
UTLEY ROBERT R.
分类号
E06C7/44
主分类号
E06C7/44
代理机构
代理人
主权项
地址
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