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Teaching puzzle
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Patent number 6,702,586
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Issue date Mar 9, 2004
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Sharmac Designs LLC
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Sharon A. Miller
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A63 - SPORTS GAMES AMUSEMENTS
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Two-sided puzzle
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Patent number 6,336,631
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Issue date Jan 8, 2002
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John K. Volkert
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A63 - SPORTS GAMES AMUSEMENTS
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Games and puzzles
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Patent number 5,868,388
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Issue date Feb 9, 1999
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Mark Thornton Wood
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A63 - SPORTS GAMES AMUSEMENTS
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Changeable maze game
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Patent number 5,497,991
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Issue date Mar 12, 1996
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Hua-Yu Huang
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A63 - SPORTS GAMES AMUSEMENTS
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Double sized puzzle
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Patent number 5,368,301
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Issue date Nov 29, 1994
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Dennis E. Mitchell
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A63 - SPORTS GAMES AMUSEMENTS
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Greeting card puzzle kit
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Patent number 5,232,088
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Issue date Aug 3, 1993
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Alexander A. Leondidis
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Puzzles
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Patent number 4,573,684
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Issue date Mar 4, 1986
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Alfred T. Riley
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A63 - SPORTS GAMES AMUSEMENTS
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Two-sided puzzle
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Patent number 4,333,652
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Issue date Jun 8, 1982
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Robert E. Clancy
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A63 - SPORTS GAMES AMUSEMENTS
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3869125
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Patent number 3,869,125
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Issue date Mar 4, 1975
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A63 - SPORTS GAMES AMUSEMENTS
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3837651
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Patent number 3,837,651
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Issue date Sep 24, 1974
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A63 - SPORTS GAMES AMUSEMENTS
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3707287
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Patent number 3,707,287
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Issue date Dec 26, 1972
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A63 - SPORTS GAMES AMUSEMENTS
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3010723
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Patent number 3,010,723
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Issue date Nov 28, 1961
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A63 - SPORTS GAMES AMUSEMENTS
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2394864
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Patent number 2,394,864
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Issue date Feb 12, 1946
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A63 - SPORTS GAMES AMUSEMENTS
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1948962
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Patent number 1,948,962
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Issue date Feb 27, 1934
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A63 - SPORTS GAMES AMUSEMENTS
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1907382
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Patent number 1,907,382
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Issue date May 2, 1933
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A63 - SPORTS GAMES AMUSEMENTS
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1597260
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Patent number 1,597,260
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Issue date Aug 24, 1926
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A63 - SPORTS GAMES AMUSEMENTS