Ralf Sieckmann v Deutsches Patent und Markenamt

In trademark law, Sieckmann v German Patent and Trademark Office (case C-273/00) issued on December 12, 2002, is widely recognised as a landmark decision of the European Court of Justice on the graphical representation of non-conventional trademarks under the European Trade Marks Directive. The case involved a "methyl cinnamate" scent, which the applicant had described "as balsamically fruity with a slight hint of cinnamon".

Source: Wikipedia — Ralf Sieckmann v Deutsches Patent und Markenamt (CC BY-SA 4.0)