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Tireroller
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Patent number 4,011,919
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Issue date Mar 15, 1977
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Theodore Oskar Groeger
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B60 - VEHICLES IN GENERAL
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3852872
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Patent number 3,852,872
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Issue date Dec 10, 1974
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B60 - VEHICLES IN GENERAL
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3801124
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Patent number 3,801,124
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Issue date Apr 2, 1974
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B60 - VEHICLES IN GENERAL
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3089738
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Patent number 3,089,738
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Issue date May 14, 1963
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B60 - VEHICLES IN GENERAL