IP analysis: This case represents another decision in the global patent battle between the claimants (Nokia) and the defendants (Oppo) in respect of Nokia’s allegation that Oppo have infringed European Patent (UK) No 2 981 103 B1 (the Patent) by the sale of certain mobile phones with 4G/LTE and 5G functionality (the Alleged Infringement). In contrast to the separate action heard by Mr Justice Meade between Nokia and Oppo in relation to the validity of Nokia’s separate implementation patent ([2022] EWHC 2814 (Pat)), this case concerned the validity of Nokia’s standard essential patent (SEP). Oppo did not generally deny essentiality or infringement, but rather argued that the Patent was invalid on multiple grounds. The court held that the Patent was indeed valid and essential, meaning that the Patent was infringed by the presence of 4G and 5G functionality in Oppo’s mobile phones. Written by Alan Harper, Intellectual Property partner at Walker Morris LLP.