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3784147
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Patent number 3,784,147
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Issue date Jan 8, 1974
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B60 - VEHICLES IN GENERAL
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3743229
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Patent number 3,743,229
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Issue date Jul 3, 1973
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B60 - VEHICLES IN GENERAL
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Patent number 3,075,736
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Issue date Jan 29, 1963
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B60 - VEHICLES IN GENERAL
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2712346
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Patent number 2,712,346
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Issue date Jul 5, 1955
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B60 - VEHICLES IN GENERAL