ACT_590302/2023

Düsseldorf Local Division full merits judgment in an infringement action by Tridonic GmbH & Co KG against CUPOWER entities concerning EP 2 011 218 B1 (a patent relating to LED driver/control circuits). The court dismissed the infringement action in its entirety, finding that the accused LED power supply products do not fulfil feature 7.4 of the patent (decoupling element) because the capacitor C3 in the defendants' design does not achieve the complete electrical separation required by the claim – it remains continuously connected to the control unit regardless of switch state. The defendants' counterclaim for revocation was also dismissed (patent maintained). Costs were split: claimant bears costs of the infringement action; defendants bear costs of the revocation counterclaim equally.