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经营范围
发明名称
Stair structure
摘要
申请公布号
US3257761(A)
申请公布日期
1966.06.28
申请号
US19650465247
申请日期
1965.06.07
申请人
KLEIN LEWIS D
发明人
KLEIN LEWIS D.
分类号
E04F11/025
主分类号
E04F11/025
代理机构
代理人
主权项
地址
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