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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61/00
Tennis nets or accessories for tennis or like games; , e.g. volley-ball
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A63B61/02
Posts; Revolvably-mounted posts; ; Straining or adjusting devices on the posts, e.g. coin- or time operated
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