In the case of Ho Tack Sien & Ors v Rotta Research Laboratorium SpA & Anor; Registrar Of Trade Marks (Intervener) & Another Appeal [2015] 4 CLJ 20, the plaintiff, who is the registered proprietor of the Viatril-S mark for pharmaceutical products in Malaysia, had succeeded in an action against the defendants in the High Court for infringement and passing off of the plaintiff's mark and obtained an order to expunge the Artril-250 mark from the register. The Court of Appeal affirmed the High Court's decision but set aside the plaintiff's claim for expungement. The court held that notwithstanding that infringement was established, the court could still elect not to allow expungement of the Artril-250 mark. The Court of Appeal also held that the Registrar of Trade Marks should be made a party in a rectification or expungement proceeding and the registrar's evidence be heard before the High Court made a finding on the plaintiff's application for expungement.