发明名称 Angled manhole sealing band and method for use
摘要 The invention relates to a device and method for sealing a manhole structure. A band with a relatively rigid angled corner engages the upper margin of a manhole structure. Adhesives may also be used with the band to enhance the seal with the manhole structure.
申请公布号 US2008170908(A1) 申请公布日期 2008.07.17
申请号 US20070654369 申请日期 2007.01.17
申请人 ESS PAUL H 发明人 ESS PAUL H.
分类号 E02D29/14 主分类号 E02D29/14
代理机构 代理人
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