Jisu Yun specializes in intellectual property (IP) matters, such as patent applications, patent invalidity analysis, and prior art surveys and advisory, for leading domestic and foreign clients in the electrical and electronics fields, such as semiconductor, artificial intelligence (AI), and telecommunication standards (3GPP). She also has experience in prior art analysis related to semiconductor processes. Jisu Yun joined Lee & Ko IP in 2025 and has since handled a wide range of IP matters in the areas of electrical and electronic technologies.