Grimme Maschinenfabrik GmbH & Co KG v Derek Scott (t/a Scotts Potato Machinery): Contributory Infringement and ???Means Essential??? In Grimme Maschinenfabrik GmbH & Co KG v Derek Scott (t/a Scotts Potato Machinery) [2010] EWCA Civ 1110, Grimme???s patent related to a machine for sorting potatoes from the by-products of the harvesting process, such as earth, stones and stalks.