Patent classifications
A
HUMAN NECESSITIES
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A43
FOOTWEAR
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A43C
FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
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15/00
Non-skid devices or attachments
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A43C15/16
Studs; or cleats; for football or like boots
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A43C15/162
characterised by the shape
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A43C15/164
having a circular cross section
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A43C15/167
frusto-conical or cylindrical
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