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经营范围
发明名称
Subterranean drainage system
摘要
A subterranean drain system that includes hollow dimples that extend perpendicularly from a drain board. The system also includes a connector that typically allows multiple boards to be connected together, or to connect to other elements.
申请公布号
US6802668(B2)
申请公布日期
2004.10.12
申请号
US20020272971
申请日期
2002.10.16
申请人
PARKER ALTON F.
发明人
PARKER ALTON F.
分类号
E02D31/02;(IPC1-7):E02B11/00;E02D19/00
主分类号
E02D31/02
代理机构
代理人
主权项
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