发明名称 Traction providing device(s) for open grid bridges and methods of use
摘要 The invention pertains to a device which, when inserted and affixed to an open grid deck spaces of an open grid bridge, provides increased traction for trespassing motor vehicles. The invention also pertains to methods of affixing the traction providing devices in various spacial arrangements.
申请公布号 US5447387(A) 申请公布日期 1995.09.05
申请号 US19930123878 申请日期 1993.09.20
申请人 FAGAN, THOMAS 发明人 FAGAN, THOMAS
分类号 E01D19/12;(IPC1-7):E01C9/10;E01C11/24 主分类号 E01D19/12
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