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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9/00
Games not otherwise provided for
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A63F9/06
Patience; Other games for self-amusement
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A63F9/08
Puzzles provided with elements movable in relation,; i.e. movably connected; , to each other
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A63F9/0826
Three-dimensional puzzles with slidable or rotatable elements or groups of elements, the main configuration remaining unchanged, e.g. Rubik's cube
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A63F9/0861
with elements slidably connected to neighbouring elements, e.g. with hollow interior
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