Patent classifications
A
HUMAN NECESSITIES
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A63
SPORTS; GAMES; AMUSEMENTS
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A63C
SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
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A63C9/08
yieldable or self-releasing in the event of an accident, i.e. safety bindings
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A63C9/084
with heel hold-downs, e.g. swingable
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