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发明名称
Machine for constructing height adjustable stair steps
摘要
A machine for constructing height adjustable stair steps with tread/riser unit, and riser bracket.
申请公布号
US8091295(B1)
申请公布日期
2012.01.10
申请号
US20100772546
申请日期
2010.05.03
申请人
LEWIS JOHN ROBERT
发明人
LEWIS JOHN ROBERT
分类号
E04F11/00
主分类号
E04F11/00
代理机构
代理人
主权项
地址
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