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Wheel deployment apparatus
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Patent number 9,351,550
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Issue date May 31, 2016
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Retrac Enterprises INC
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Joseph I. Arthur
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A45 - HAND OR TRAVELLING ARTICLES
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Retractable wheel assembly
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Patent number 8,757,643
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Issue date Jun 24, 2014
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Retrac Enterprises Inc
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Joseph I. Arthur
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A45 - HAND OR TRAVELLING ARTICLES
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Chassis with retractable wheels
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Patent number 7,997,591
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Issue date Aug 16, 2011
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Retrac Enterprises, Inc.
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Joseph I Arthur
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B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS