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Opinion of Mr Advocate General Ruiz-Jarabo Colomer delivered on 6 November 2001. # Ralf Sieckmann v Deutsches Patent- und Markenamt. # Reference for a preliminary ruling: Bundespatentgericht - Germany. # Trade marks - Approximation of laws - Directive 89/104/EEC - Article 2 - Signs of which a trade mark may consist - Signs capable of being represented graphically - Olfactory signs. # Case C-273/00. TITJUR Sieckmann