发明名称 TREAD BALLAST OR WEIGHT FOR TEMPORARY TRAFFIC CONTROL DEVICES AND POSTS
摘要 A weight or ballast for a temporary traffic control device or post is made of one or more tire tread sections. An opening extending through or formed by the tread sections is sized to receive an upstanding portion of the device or post.
申请公布号 CA2146417(A1) 申请公布日期 1995.12.28
申请号 CA19952146417 申请日期 1995.04.05
申请人 PLASTIC SAFETY SYSTEMS, INC. 发明人 COWAN, DAVID E.;COWAN, DAVID A.;DOBRIN, ALVIN R.
分类号 E01F9/012 主分类号 E01F9/012
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