Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B60
VEHICLES IN GENERAL
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B60B
VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
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37/00
Wheel-axle combinations, e.g. wheel sets
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B60B37/06
the wheels being integral with, or rigidly attached to, hollow axles
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