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Sensory games
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Patent number 4,981,300
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Issue date Jan 1, 1991
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Saitek Limited
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Eric E. Winkler
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A63 - SPORTS GAMES AMUSEMENTS
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3760404
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Patent number 3,760,404
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Issue date Sep 18, 1973
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A63 - SPORTS GAMES AMUSEMENTS
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3683363
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Patent number 3,683,363
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Issue date Aug 8, 1972
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A63 - SPORTS GAMES AMUSEMENTS
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2693962
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Patent number 2,693,962
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Issue date Nov 9, 1954
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G07 - CHECKING-DEVICES