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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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11/00
Rail joints
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E01B11/02
Dismountable rail joints
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E01B11/20
with gap-bridging
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E01B11/22
by parts of the rails
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E01B11/26
with interlocking rail ends
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