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3495879
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Patent number 3,495,879
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Issue date Feb 17, 1970
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B60 - VEHICLES IN GENERAL
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3473850
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Patent number 3,473,850
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Issue date Oct 21, 1969
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B60 - VEHICLES IN GENERAL
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3331641
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Patent number 3,331,641
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Issue date Jul 18, 1967
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B60 - VEHICLES IN GENERAL
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3172505
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Patent number 3,172,505
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Issue date Mar 9, 1965
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B60 - VEHICLES IN GENERAL