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Jong Seok Kim

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Kim & Chang

Work Department

Intellectual Property, Litigation, Entertainment, Sports & Leisure, IP Litigation, Trade Secret Litigation, Health Litigation, Intellectual Property Litigation, Trade Secret & Corporate Information Protection


Jong Seok Kim is an attorney at Kim & Chang. He practices primarily in intellectual property, litigation, and entertainment.

As a patent attorney at the firm, Mr. Kim is an expert in patent, trademarks, design, and trade secret infringement cases.

Before joining Kim & Chang, Mr, Kim served in the Korean judiciary for 16 years, initially as a districty court judge, and later as a judge at the Patent Court and a research judge at the Supreme Court. During his tenure as a judge, Mr. Kim gained extensive experiences in a variety of litigations involving intellectual property related issues.

He received his LL.B. from Yonsei University and attended Judicial Research & Training Institute of the Supreme Court of Korea. He is admitted to the Korea bar.


Korean and English


Admiited to bar, Korea, 1997


Judicial Research & Training Institute of the Supreme Court of Korea (1997)
College of Law, Yonsei University (LL.B., 1993)

South Korea: Intellectual property

Intellectual property – Local firms

Within: Intellectual property – Local firms

Jay Young-June Yang leads Kim & Chang’s substantial and prominent IP practice, which remains the ‘top-choice’ for international pharmaceutical companies and international brands; the practice is well known for its strength in litigation and in a recent landmark case, Bo Hyun Park and Duck Soon Chang successfully defended Astellas Pharma against challenges to the patent term extension, the first Korean case in which the court issued specific guidance regarding the proper calculation method for determining the PTE term. Young Kim has an impressive track record in pharmaceutical patent litigation; she and Yu-Seog Won have defended one of Pfizer’s top-selling drugs, Lyrica, in various patent actions against generic companies. Sang-Wook Han is experienced in advising Japanese clients. For trade mark and design matters, Sung-Nam Kim, Ann Nam-Yeon Kwon, Angela Kim and John J Kim all have substantial experience in prosecution, enforcement and portfolio management. In patent litigation, Jong Seok Kim, Bong Seop Kim and Kum Uk Lee successfully represented AT Solutions in invalidating the patents of a competitor.

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