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Ball-shaped puzzle
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Patent number 7,918,457
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Issue date Apr 5, 2011
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DPT
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Marc Wittevrongel
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A63 - SPORTS GAMES AMUSEMENTS
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Puzzle pen
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Patent number 7,275,744
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Issue date Oct 2, 2007
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Chin-Yi Kuo
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A63 - SPORTS GAMES AMUSEMENTS
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Cubic puzzle
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Patent number 6,513,808
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Issue date Feb 4, 2003
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Chih Chung Fang
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A63 - SPORTS GAMES AMUSEMENTS
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Slide puzzle
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Patent number 5,529,301
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Issue date Jun 25, 1996
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Langenbach; Klaus
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Erhard Feller
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A63 - SPORTS GAMES AMUSEMENTS
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1550552
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Patent number 1,550,552
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Issue date Aug 18, 1925
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A63 - SPORTS GAMES AMUSEMENTS
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1539738
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Patent number 1,539,738
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Issue date May 26, 1925
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A63 - SPORTS GAMES AMUSEMENTS
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1534599
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Patent number 1,534,599
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Issue date Apr 21, 1925
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A63 - SPORTS GAMES AMUSEMENTS
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1438746
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Patent number 1,438,746
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Issue date Dec 12, 1922
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A63 - SPORTS GAMES AMUSEMENTS
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1415625
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Patent number 1,415,625
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Issue date May 9, 1922
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A63 - SPORTS GAMES AMUSEMENTS