Founded in Akron in 1941 and now based in Mogadore, Ohio, Diamond America Corporation designs and manufactures extrusion equipment, including custom dies and single-screw extruders, for customers around the world. The privately held, family-owned company grew from a rubber-industry machine shop into a U.S. manufacturer with a 30,000-plus-square-foot facility and an expanded lab for pilot testing, equipment design, and scale-up support. Its equipment has been used in more than 70 countries.