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Automatic bowling alley
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Patent number 5,562,549
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Issue date Oct 8, 1996
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NSM Aktiengesellschaft
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Ullrich Schulze
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A63 - SPORTS GAMES AMUSEMENTS
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Bowling pin positioning apparatus
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Patent number 4,068,845
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Issue date Jan 17, 1978
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Patentverwertungs-und Finanzierungsgesellschaft, Serania AG
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August Schmid
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A63 - SPORTS GAMES AMUSEMENTS
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3219345
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Patent number 3,219,345
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Issue date Nov 23, 1965
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A63 - SPORTS GAMES AMUSEMENTS
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3174751
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Patent number 3,174,751
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Issue date Mar 23, 1965
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A63 - SPORTS GAMES AMUSEMENTS
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3149838
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Patent number 3,149,838
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Issue date Sep 22, 1964
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A63 - SPORTS GAMES AMUSEMENTS