Case T-294/20: Judgment of the General Court of 8 December 2021 — Talleres de Escoriaza v EUIPO — Salto Systems (KAAS KEYS AS A SERVICE) (EU trade mark — Invalidity proceedings — EU word mark KAAS KEYS AS A SERVICE — Absolute grounds for refusal — Descriptive character — Article 7(1)(c) of Regulation (EC) No 207/2009 (now Article 7(1)(c) of Regulation (EU) 2017/1001) — No distinctive character — Article 7(1)(b) of Regulation No 207/2009 (now Article 7(1)(b) of Regulation 2017/1001) — Signs or indications which have become customary — Article 7(1)(d) of Regulation No 207/2009 (now Article 7(1)(d) of Regulation 2017/1001) — Obligation to state reasons — Right to be heard — Article 94(1) of Regulation 2017/1001)