Case T-282/20: Judgment of the General Court of 21 April 2021 — Apologistics v EUIPO — Kerckhoff (APO) (EU trade mark — Invalidity proceedings — EU word mark APO — Absolute grounds for refusal — Descriptiveness — Article 7(1)(c) of Regulation (EC) No 207/2009 (now Article 7(1)(c) of Regulation (EU) 2017/1001) — Lack of distinctiveness — Article 7(1)(b) of Regulation No 207/2009 (now Article 7(1)(b) of Regulation 2017/1001))