Opinion of Advocate General Pitruzzella delivered on 11 April 2019.#Bayer Pharma AG v Richter Gedeon Vegyészeti Gyár Nyrt. and Exeltis Magyarország Gyógyszerkereskedelmi Kft.#Request for a preliminary ruling from the Fővárosi Törvényszék.#Reference for a preliminary ruling — Intellectual property — Patents — Directive 2004/48/EC — Article 9(7) — Placing on the market of products infringing a patent right — Provisional measures — Patent subsequently declared invalid — Consequences — Right to appropriate compensation for losses caused by the provisional measures.#Case C-688/17.