Patent classifications
A
HUMAN NECESSITIES
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A63
SPORTS; GAMES; AMUSEMENTS
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A63F
CARD, BOARD, OR ROULETTE GAMES; INDOOR GAMES USING SMALL MOVING PLAYING BODIES; VIDEO GAMES; GAMES NOT OTHERWISE PROVIDED FOR
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7/00
Indoor games using small moving playing bodies, e.g. balls, discs or blocks
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A63F7/04
using balls to be shaken or rolled in small boxes; , e.g. comprising labyrinths
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A63F7/041
Two-dimensional labyrinths
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