Case C-617/15: Judgment of the Court (Second Chamber) of 18 May 2017 (request for a preliminary ruling from the Oberlandesgericht Düsseldorf — Germany) — Hummel Holding A/S v Nike Inc., Nike Retail BV (Reference for a preliminary ruling — Intellectual property — Regulation (EC) No 207/2009 — EU trade mark — Article 97(1) — International jurisdiction — Action for infringement brought against an undertaking with its seat in a third country — Second-tier subsidiary with its seat in the Member State of the court seised — Definition of ‘establishment’)