Patent classifications
A
HUMAN NECESSITIES
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A43
FOOTWEAR
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A43B
CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
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13/00
Soles; Sole-and-heel integral units
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A43B13/02
characterised by the material
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A43B13/12
Soles with several layers of different materials
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A43B13/125
characterised by the midsole or middle layer
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A43B13/127
the midsole being multilayer
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