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Ski brake
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Patent number 4,252,337
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Issue date Feb 24, 1981
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Vereinigte Baubeschlagfabriken Gretsch & Co. GmbH
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Heinz Luithlen
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A63 - SPORTS GAMES AMUSEMENTS
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Ski brake
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Patent number 4,167,275
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Issue date Sep 11, 1979
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Vereinigte Baubeschlagfabriken Gietsch & Co. GmbH
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Klaus Weiss
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A63 - SPORTS GAMES AMUSEMENTS
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Ski brake
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Patent number 4,108,465
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Issue date Aug 22, 1978
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Vereinigte Baubeschlagfabriken, Gretsch & Co. GmbH
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Manfred Schmidt
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A63 - SPORTS GAMES AMUSEMENTS