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Air-suspension system
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Patent number 6,332,624
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Issue date Dec 25, 2001
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Mannesmann Sachs AG
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Joachim Gilsdorf
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B60 - VEHICLES IN GENERAL
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Gas-operated spring
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Patent number 4,982,937
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Issue date Jan 8, 1991
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Firma Carl Freudenberg
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Hans-Gerd Eckel
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B60 - VEHICLES IN GENERAL
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3790147
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Patent number 3,790,147
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Issue date Feb 5, 1974
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B60 - VEHICLES IN GENERAL
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3404898
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Patent number 3,404,898
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Issue date Oct 8, 1968
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B60 - VEHICLES IN GENERAL