US Patent Class 404
ROAD STRUCTURE, PROCESS, OR APPARATUS-- Main Headings



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Current as of: June, 1999
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CLASS NOTES
1  DF  ROAD SYSTEM (E.G., ELEVATED, INTERCHANGE)
2  DF  DRAIN OR GUTTER {2}
6  DF  TRAFFIC STEERING DEVICE OR BARRIER {1}
9  DF  TRAFFIC DIRECTOR {3}
17  DF  PAVEMENT {9}
71  DF  MISCELLANEOUS ROAD STRUCTURE (E.G., HEATED PAVEMENT)
72  DF  PROCESS {6}
83  DF  APPARATUS {17}
134  DF  REINFORCEMENT STRUCTURE PER SE {1}
136  DF  ROAD CHAIR PER SE