A major South Korean patent dispute concerning the gastroesophageal reflux disease treatment K-CAB tablets (tegoprazan) reached a resolution on November 20 2025. The Korean Supreme Court affirmed earlier rulings in favour of the patentee by dismissing the final three appeals lodged by generic companies without further substantive review.The generics had argued that the scope of the substance patent during the patent term extension (PTE) should be limited t

The South Korean Intellectual Property High Court (the IP High Court) has recently rendered a decision dismissing the use of the ‘abuse of right defence’ in invalidation actions. In the decision, given the difference in nature between invalidation and infringement litigation, the court held that even when an invalidation trial is filed on the basis of a prior design right that itself would likely have been invalidated, this does not constitute an abuse of

Korean IP High Court, Case Nr: 023Na10693In a significant decision for patent holders, Korea's IP High Court has ruled that a foreign company's online listings of products protected by Korean patents on a Chinese e-commerce platform can be held liable for patent infringement. The court found that targeting Korean consumers through localized online content constitutes a domestic act of infringement even without proven sales or a physical presence in the cou

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