Patent classifications
E
FIXED CONSTRUCTIONS
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E01
CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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E01B
PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
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1/00
Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
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E01B1/002
Ballastless track, e.g. concrete slab trackway, or with asphalt layers
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E01B1/007
with interlocking means to withstand horizontal forces
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