The two authors Dr. Wolfgang Kellenter and Axel Verhauwen gave a presentation at the 19th Düsseldorfer Patentrechtstage on March 25, 2021. The topic concerned SEPs in the supply and exploitation chain. Already at the Düsseldorfer Patentrechtstage of 2018, both authors had given a related presentation on the topic "The Antitrust License Objection under FRAND Principles".