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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A63B53/0416
Heads having an impact surface provided by a face insert
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A63B53/042
the face insert consisting of a material different from that of the head
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A63B53/0425
the face insert comprising two or more different materials
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