Court of Justice 5 December 2017, C-478/16 P (European Union Intellectual Property Office v Group OOD.)

OPINION OF ADVOCATE GENERAL CAMPOS SÁNCHEZ-BORDONA delivered on 5 December 2017 ( 1 ) Case C‑478/16 P European Union Intellectual Property Office (EUIPO) v Group OOD (Appeal — European Union trade mark — Definition and acquisition of the European Union trade mark — Relative grounds for refusal — Opposition by the proprietor of a non-registered trade mark or of another sign used in the course of