Patent classifications
E
FIXED CONSTRUCTIONS
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E01
CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
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13/00
Arrangements for obstructing or restricting traffic, e.g. gates, barricades; ; Preventing passage of vehicles of selected category or dimensions
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E01F13/02
free-standing; portable, e.g. for guarding open manholes; ; Portable signs or signals specially adapted for fitting to portable barriers
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