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发明名称
FOLDING STEP STOOL
摘要
申请公布号
CA316619(A)
申请公布日期
1931.11.03
申请号
CAD316619
申请日期
申请人
ROBERT C. HAYNE
发明人
ROBERT C. HAYNE
分类号
主分类号
代理机构
代理人
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地址
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