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经营范围
发明名称
Preformed step
摘要
申请公布号
US1861751(A)
申请公布日期
1932.06.07
申请号
US19290397683
申请日期
1929.10.05
申请人
LEWELLYN NICOLS WILLIAM
发明人
NICOLS WILLIAM LEWELLYN
分类号
E04F11/035
主分类号
E04F11/035
代理机构
代理人
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地址
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