Patent classifications
E
FIXED CONSTRUCTIONS
Load children
E01
CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Load children
E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
Load children
13/00
Arrangements for obstructing or restricting traffic, e.g. gates, barricades; ; Preventing passage of vehicles of selected category or dimensions
Load children Filter patents View analytics View as hierarchy
E01F13/04
movable to allow or prevent passage
Load children Filter patents View analytics View as hierarchy
E01F13/048
with obstructing members moving in a translatory motion, e.g. vertical lift barriers, sliding gates
Filter patents View analytics View as hierarchy