Intellectual Property
Asia-Pacific Guide 2025 : South Korea
Band 2
About
Provided by Yoon & Yang LLC
Yoon & Yang's IP Practice Group handles a wide range of matters relating to patents, trade secrets, copyright and trademark disputes and prosecution. Work flows from all of IP areas are increasingly consistent between 2023 and 2024.
The Practice Group also houses prominent attorneys including Wonil Kim, Dongju Kwon, all of whom are senior partners in the Group. The two senior partners are well reputed by the clients for their active involvement in patents (Wonil Kim, Dongju Kwon) and trade secret (Wonil Kim) matters.
For junior partners, it is noteworthy to highlight Keun Woo Lee, Sejung Lee and Chang Woo Lee. Keun Woo is involved in the Firm's most high-profile trade secret and copyrights litigations. Keun Woo also retains three major broadcasting companies in his clientele. Sejung Lee and Chang Woo Lee are both experts in patent and trade secret issues. Sejung, who was successfully chosen as a “40 Under 40 in Asia” by Asian Legal Business currently handles SK Innovation-LG Chem's trade secret dispute and Qualcomm's patent related litigation in South Korea, both of which are among the most high-profile cases in the Korean IP market.
From an industry perspective, Yoon & Yang strongly holds its position as an IT powerhouse for IP matters, and the firm retains Qualcomm, SK Innovation, SK Hynix as its long standing clients and this trend still continues in 2024.
Chambers Review
Yoon & Yang is recognised for its increasingly sophisticated practice and strong support from clients for its litigation abilities, especially in the IT and pharmaceutical sectors. The team services a domestic and multinational client base in respect of patent, trade mark, trade secret misappropriation and copyright infringement disputes. It is frequently instructed on cross-border IP litigation and also experienced in handling cases involving issues of competition law.
Work Highlights
- Yoon & Yang successfully represented W-Scope in a patent infringement action brought by Asahi Kasei.
Strengths
Provided by Chambers
"They continuously increase their expertise in pharmaceutical patents and trade secrets. They examine customer problems from multiple angles."
"Yoon & Yang identified additional risks in advance and reviewed countermeasures."
"They continuously increase their expertise in pharmaceutical patents and trade secrets. They examine customer problems from multiple angles."
"Yoon & Yang identified additional risks in advance and reviewed countermeasures."
Notable Practitioners
Dongju Kwon heads Yoon & Yang intellectual property practice group and has notable expertise in patent infringement and invalidation claims.
"Dongju is able to handle legal matters fairly and has excellent persuasion skills."
"He has all the qualities, competencies and abilities of a great leader."
Kim Wonil has particular expertise in advising on patent infringement, trade secret misappropriation and invalidation proceedings. He continues to serve a host of domestic and foreign clients in the pharmaceutical and technology sectors.
"He identifies problems, establishes countermeasures and responds thoroughly."
Ranked Lawyers at
Yoon & Yang LLC
South Korea
Members
Provided by Yoon & Yang LLC
Chang Woo Lee
Chulgun Lim
Dongju Kwon
Head of Department
Geonyoung Koh
Jeong Gyu Kim
Keun Woo Lee
Sejung Lee
Clients
Provided by Yoon & Yang LLC
Hanmi Pharm
Hyundai Mobis
JNTC
Kumho P&B Chemicals
Kumho Petrochemical
Kumho Trading
SK On
W-Scope