Case T-878/19: Judgment of the General Court of 17 March 2021 — Bende v EUIPO — Julius-K9 (K-9) (EU trade mark — Invalidity proceedings — EU word mark K-9 — Relative grounds for refusal — Signs which have become customary — Article 7(1)(d) of Regulation (EC) No 207/2009 (now Article 7(1)(d) of Regulation (EU) 2017/1001))