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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A43B23/04
Uppers made of one piece; Uppers with inserted gussets
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A43B23/045
Uppers with inserted gussets
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A43B23/047
the gusset being elastic
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