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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15/00
Clubs for gymnastics or the like; , e.g. for swinging exercises
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A63B15/005
with a weight movable along the longitudinal axis of the club due to centrifugal forces
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