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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A63F3/00173
Characteristics of game boards, alone or in relation to supporting structures or playing piece
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A63F3/00574
Connections between board and playing pieces
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A63F3/00634
Sliding connections, e.g. playing pieces sliding in a groove
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A63F2003/00637
with non-intersecting, e.g. parallel, grooves
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