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Pivoting board game
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Patent number 6,318,726
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Issue date Nov 20, 2001
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Paul Kenneth Nicholls
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A63 - SPORTS GAMES AMUSEMENTS
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Chess set construction
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Patent number 5,662,326
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Issue date Sep 2, 1997
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Educational Chess Enterprises
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Nagib Gebran
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A63 - SPORTS GAMES AMUSEMENTS
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Competitive game device
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Patent number 4,783,082
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Issue date Nov 8, 1988
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Chen; Chun Nan (Ignatius)
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Chung C. Chen
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A63 - SPORTS GAMES AMUSEMENTS
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Game apparatus
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Patent number 4,159,117
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Issue date Jun 26, 1979
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Marvin Glass & Associates
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Wayne A. Kuna
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A63 - SPORTS GAMES AMUSEMENTS
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3380305
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Patent number 3,380,305
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Issue date Apr 30, 1968
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A63 - SPORTS GAMES AMUSEMENTS