https://www.kellogg-concepts.com/object/splitstem-prototype%2C-2004 2023-04-21 https://www.kellogg-concepts.com/object/checker-board-prototype%2C-2005 2023-04-19 https://www.kellogg-concepts.com/object/quadule-prototype%2C-2007 2023-04-21 https://www.kellogg-concepts.com/object/scaffold-sofa-concept%2C-2011 2023-04-19 https://www.kellogg-concepts.com/object/lasso-chair-concept%2C-2016 2023-04-21 https://www.kellogg-concepts.com/object/panel-chair-concept%2C-2008 2023-04-19 https://www.kellogg-concepts.com/object/hexaflexagon-mechanism-concept%2C-2008 2023-04-19 https://www.kellogg-concepts.com/object/modgeo-installation-kit-prototype%2C-2005 2023-04-21 https://www.kellogg-concepts.com/object/porcelain-curios-prototype%2C-2004 2023-04-21 https://www.kellogg-concepts.com/object/5-%26-up-chair-development%2C-2015---present 2023-05-05 https://www.kellogg-concepts.com/object/plated-mobiles-mechanical-prototypes%2C-2004---present 2023-05-05