Case T-15/20: Judgment of the General Court of 30 June 2021 — Skyliners v EUIPO — Sky (SKYLINERS) (EU trade mark — Opposition proceedings — Application for EU word mark SKYLINERS — Earlier EU word marks SKY — Relative ground for refusal — Article 8(1)(b) and Article 41(1)(a) of Regulation (EC) No 207/2009 (now Article 8(1)(b) and Article 46(1)(a) of Regulation (EU) 2017/1001) — Entitlement to file the opposition)