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3814436
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Patent number 3,814,436
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Issue date Jun 4, 1974
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A63 - SPORTS GAMES AMUSEMENTS
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3690670
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Patent number 3,690,670
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Issue date Sep 12, 1972
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A63 - SPORTS GAMES AMUSEMENTS
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3658342
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Patent number 3,658,342
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Issue date Apr 25, 1972
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A63 - SPORTS GAMES AMUSEMENTS
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3586334
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Patent number 3,586,334
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Issue date Jun 22, 1971
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A63 - SPORTS GAMES AMUSEMENTS
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3559992
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Patent number 3,559,992
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Issue date Feb 2, 1971
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A63 - SPORTS GAMES AMUSEMENTS