was a German pharmacist and the inventor of the modeling paste Plastilin. In English-speaking countries this material is also known as "plasticine." Because of different patent rights in Germany and England there are different views about who actually invented plasticine. In England, William Harbutt is seen as the inventor, while in Germany it is Franz Kolb. Kolb's German patent is from while Harbutt's English one is from The exact formulation of the two products is different.