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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2208/00
Characteristics or parameters related to the user or player
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A63B2208/0228
Sitting on the buttocks
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A63B2208/0238
with stretched legs, like on a bed
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