2026-03-16 - LD Düsseldorf - Ipg Laser et al. v. TRUMPF Laser- und Systemtechnik et al. - UPC_CFI_733/2024, UPC_CFI_255/2025

The Düsseldorf Local Division found a dual-beam fibre laser to infringe an arrangement claim directly and the corresponding method claim indirectly, and dismissed the counterclaim for revocation. The claim construction is broad in three respects that decided the case: a switchable device with at least two switching positions is any device that can be brought into two positions performing the claimed functions, so electronic control of two laser modules qualifies and the claim is not confined to the mechanical switching optics of the embodiments; the first and the different second laser beam need not come from different sources or have different wavelengths, because the claim addresses the moment of coupling and not the source; and coupling does not require free space in front of the fibre end face, so a combiner module with spliced input fibres still infringes. On validity the division applied the Court of Appeal's November 2025 framework and found no pointer or motivation from D6, whose whole teaching is to combine radiation into one profile and which therefore leads the skilled person away from generating different profiles. The decision also confines Art. 64 UPCA corrective measures to the directly infringing products: recall, removal and destruction were refused for components attacked only as indirect infringement.