Companies 3D Systems Corporation (DDD), Stratasys, Ltd. (SSYS) & ExOne Co (XONE): Anthony Vicari & Ashok Kumar Were Right About Growth, Not Stock PricesBy Solon Harmony B. DolorAugust 8, 2014 The 3D printing industry, which 3D Systems Corporation (NYSE:DDD), Stratasys, Ltd. (NASDAQ:SSYS) and ExOne Co (NASDAQ:XONE) are involved in would…