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  • Publication Date: December 31, 1969
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    US-2017361652-A1December 21, 2017Romualdo Monteiro de BarrosRolling device, especially for furniture, luggage cases and the like
    US-7578028-B2August 25, 2009Robert SellarsDevice for providing multi-directional movement
    US-9211015-B2December 15, 2015Michael Louis LarzelereChair with ball-casters