Yulchon LLC

Yulchon LLC is one of Korea’s leading full-service law firms. It has the highest win rate at the Korean Supreme Court and has been recognised by Korean law students as the preferred choice of employer and by Korean lawyers as the best workplace.

Yulchon employs more than 480 professionals, including more than 60 foreign-licensed professionals. The firm’s perspective is international and its reach is global. Yulchon has represented clients from six continents and helped companies to expand around the globe.

Yulchon has been consistently acknowledged as a top-tier law firm in multiple areas, including tax, competition, corporate and M&A and intellectual property. For example:

  • the IAM Patent 1000 ranked the firm’s IP litigation and transaction practices as Tier 1;
  • Managing Intellectual Property ranked Yulchon as Tier 1 in its IP patent contentious category for six consecutive years;
  • Asian Legal Business ranked Yulchon as Tier 1 for patents for five consecutive years; and
  • Asialaw Profiles ranked Yulchon’s IP practice as outstanding for two consecutive years.

To further its reputation as the most active Korean law firm in outbound investments, Yulchon recently hired several overseas-licensed professionals and opened a Jakarta office, adding to its network of offices in Moscow, Ho Chi Minh City, Hanoi, Beijing and Yangon.

IP practice group

Yulchon’s IP group listens to clients’ needs and focuses on their business strategies to provide tailored legal services relating to litigation, arbitration, licensing, negotiations, strategic counselling and compliance. The IP group is experienced in all aspects of IP-related issues under Korean law, including patent and utility models, trademarks, designs, copyright, trade secrets, unfair competition, entertainment, privacy, Customs and international trade. The group’s expertise covers the implementation of IP-related corporate programmes, including compliance programmes for protecting trade secrets and remuneration for employee inventions and internal investigations for trade secrets misappropriation and forensic analysis to obtain tangible evidence. Further, the group is experienced in international IP dispute resolution management, including IP litigation, licensing and transactions and freedom-to-operate opinions. Working in cooperation with Yulchon’s antitrust group, the IP group also provides clear guidance to clients on issues arising from the intersection of IP and antitrust law.

The IP group consists of legal professionals with experience and knowledge in all aspects of intellectual property, technology and various industries. These professionals include former judges, Korean Intellectual Property Office patent examiners and directors, government litigation attorneys, in-house counsel and engineers. The former judges served at the Patent Court, various district courts (including the Seoul Central District Court), the IP division of the Seoul High Court and as research judges at the Supreme Court. The group’s professionals have degrees in electrical engineering, mechanical engineering, chemical engineering, computer science, pharmacy, civil, urban and geo-systems engineering and naval architecture and oceanographic engineering. They work closely as a cohesive unit, focusing on communication within the group and with clients in order to gain an accurate understanding of clients’ concerns and needs.

Jeong Yeol Choe heads the firm’s IP group with co-heads Cheol Hwan Kim and Dong Soo Han. Mr Choe and Mr Kim represented Samsung Electronics in its epic battle against Apple. Hyeong Joo Lim is an expert in implementing IP-related corporate compliance programmes and Samuel Sungmok Lee, a US-qualified partner, has extensive experience in patent licensing and international IP dispute resolution. The addition in February 2018 of Da Woo Lee, a former Korean Patent Court judge, further strengthens the IP group’s litigation expertise and experience.

IP services

The IP group offers services in the following areas:

  • patents and utility models;
  • copyright (including computer programs);
  • trade secrets;
  • unfair competition;
  • entertainment (eg, celebrities, sports and movies);
  • IP risk management (eg, IP compliance and forensic analysis);
  • IP surveys and evaluation;
  • IP licences and transactions;
  • international dispute management; and
  • protection of personal information.

Strategic alliance with YP Lee, Mock & Partners

In February 2008 the IP group formed a strategic alliance with YP Lee, Mock & Partners, one of the largest patent law firms in Korea for all technical fields, as well as for trademarks, designs and copyright. This alliance allows the IP group to utilise additional resources to efficiently and effectively handle litigation in virtually all technical fields.


Korean, English, German, Chinese, Russian, Vietnamese, French, Japanese, Spanish, Cambodian, Portuguese and Burmese.

Contact details

Yulchon LLC
Parnas Tower 38F
521 Teheran-ro
Seoul 06164
South Korea

Professional contacts

Other offices

  • Hanoi
  • Ho Chi Minh City
  • Jakarta
  • Moscow
  • Shanghai
  • Yangon

Sample client list

  • Allergan
  • AmorePacific
  • Celltrion
  • Facebook
  • Golfzon
  • Google
  • Hanmi
  • Hanwha
  • Hyundai Heavy

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