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经营范围
发明名称
Wall and step construction
摘要
申请公布号
US2208844(A)
申请公布日期
1940.07.23
申请号
US19390271684
申请日期
1939.05.04
申请人
WILLIAM P. WITHEROW
发明人
HENDERSON ALBERT
分类号
E04F11/02
主分类号
E04F11/02
代理机构
代理人
主权项
地址
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