Lee & Ko

Choong Jin Oh

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Practice Areas

IP Litigation, Patent, Trademark, Copyright, Trade Secret, Unfair Competition


A senior partner at IP Practice Group; recognized as one of the leading IP trial lawyer in Korea with a broad range of IP matters. He joined Lee & Ko in 2010 after serving on the bench for 13 years. Having reviewed numerous patent and trademark cases on the bench, he is particularly well-experienced in patent, trademark litigations in various venues. He has been awarded with many accolades in Chambers Asia, Managing IP, Benchmark Litigation and Legal 500 for his involvement in many of Korea’s notable cases.

Professional Memberships

Korean Bar Association, Korean Patent Bar Association


“Identifying the Invention Subject to Review in a Patent Scope Confirmation Trial” (2008); “WIPO’s Discussions on Protection of Non-traditional Marks and their Meaning” (2008); “Determining Similarity between an Invention and Prior Arts” (2009); “Whether the Specification is Supporting the Patent Claim” (2009)


Seoul National University, College of Law (LL.B-1992), University of Vienna (Visiting Scholar- 2003)