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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71/00
Games or sports accessories not covered in groups A63B1/00 - A63B69/00
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A63B71/02
for large-room or outdoor sporting games
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A63B71/022
Backstops, cages, enclosures or the like, e.g. for spectator protection, for arresting balls
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