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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31/00
Working rails, sleepers, baseplates, or the like, in or on the line; Machines, tools, or auxiliary devices specially designed therefor
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E01B31/02
Working rail or other metal track components on the spot
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