IP High Court Decision, 2022Heo3809 (Case Concerning Tribenzazole Amine Derivatives and Organic Electroluminescent Device Including the Same)

In summary, since Claims 1 to 4 violate the extended first-to-file rule due to the prior art, its patent registration should be invalidated. The IPTAB decision consistent with the above shall be upheld, as it is without an error justifying revocation as argued by the plaintiff.