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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23/00
Uppers; Boot legs; Stiffeners; Other single parts of footwear
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A43B23/0245
characterised by the constructive form
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A43B23/028
Resilient uppers, e.g. shock absorbing
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A43B23/029
Pneumatic upper, e.g. gas filled
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