Patent classifications
A
HUMAN NECESSITIES
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A63
SPORTS; GAMES; AMUSEMENTS
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A63B
APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
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A63B5/20
Skipping-ropes; or similar devices rotating in a vertical plane
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A63B5/205
Powered skipping rope devices
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