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3671054
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Patent number 3,671,054
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Issue date Jun 20, 1972
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A63 - SPORTS GAMES AMUSEMENTS
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3614119
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Patent number 3,614,119
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Issue date Oct 19, 1971
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A63 - SPORTS GAMES AMUSEMENTS
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3528672
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Patent number 3,528,672
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Issue date Sep 15, 1970
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A63 - SPORTS GAMES AMUSEMENTS
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2669459
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Patent number 2,669,459
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Issue date Feb 16, 1954
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A63 - SPORTS GAMES AMUSEMENTS