Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Charles M. Mettler0
Gregory H. Brown0
Date of Patent
June 15, 2010
0Patent Application Number
123412200
Date Filed
December 22, 2008
0Patent Citations Received
Patent Primary Examiner
Patent abstract
A portable highway warning device includes any number of elongated rumble strips each fabricated of a suitable flexible polymeric material. Embedded within each rumble strip are a plurality of laterally spaced metal plates or bars to provide ballast to each rumble strip. The metal plates or bars run transversely across the width of each rumble strip with sufficient spacing therebetween to permit each rumble strip to be rolled up lengthwise from end to end when not in use.
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