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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7/00
Devices preventing skis from slipping back; Ski-stoppers or ski-brakes
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A63C7/08
Stoppage blades attachable to the skis in such manner that these blades are permanently in the operative position
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