	Georg and Erich Heuer worked with their father in the business, later taking over from him in 1918, although the father remained active as a director till 1932. Georg, notably, concentrated on car body design, producing cabriolet and other designs in the early 1930s of remarkable harmony and symmetry. His "six-light" Pullman limousine design was a milestone both artistically and technically. The firm was also known for mechanically ingenious roof folding mechanisms, for which it held several patents.