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Lee & Ko Earns Top-Tier Rankings Across All Practice Areas in IAM Patent 1000 2025
Lee & Ko has once again garnered top-tier recognition across all evaluated categories in the 2025 edition of the IAM Patent 1000. The firm earned the highest band ranking of “Gold” in both patent litigation and prosecution, along with additional distinctions as “Highly Recommended” in transactions and “Recommended” in trade secret litigation. This marks the 11th consecutive year that the firm has ranked in the Gold tier for litigation and the fourth year running as a Highly Recommended firm for transactions. Notably, 10 attorneys and patent attorneys at Lee & Ko have been listed as “Recommended Individuals” across all key practice areas—litigation, prosecution, transactions, trade secrets, etc.—in recognition of their exceptional expertise in the patent field. 

ranked lawyers 
 Litigation: Un Ho Kim, John Kim, Jae Hoon Kim, Keum Nang Park, Hwan Sung Park, and Hayoun Chun
 Prosecution: Hyeon Gil Ryoo and Sungsoo (Sean) Hwang
 Transactions: Hayoun Chun and Yong Jin Cho
 Trade secrets: Hong Seon Kim

Lee & Ko’s IP Practice Group provides legal services catered to clients in response to various IP-related disputes in the United States, Europe, Japan, and other countries by leveraging its extensive overseas network while delivering optimal outcomes in IP-related consultancy and disputes through a nuanced understanding of both technology and law. A prime example of the group’s litigation excellence is its recent success representing Coway in a long-running patent infringement dispute with ChungHo Nais over ice water purifier technology. Following three years of protracted hearings, the Korean Supreme Court issued a final judgment in favor of Coway, bringing to an end the lengthy legal battle between the two companies that spanned 11 relentless years. Widely regarded as the longest-running patent litigation in Korea, this case began in 2014 when ChungHo Nais filed a complaint for patent infringement and damages against Coway. ChungHo Nais prevailed in the court of first instance, with the court acknowledging infringement claims and awarding significant compensation. Amid its multiple, though unsuccessful, patent invalidation attempts, Coway newly retained Lee & Ko in 2022 for the appellate phase, and stepping in at a pivotal juncture, the firm eventually secured a complete dismissal of all claims brought by ChungHo Nais, culminating a dramatic reversal and a landmark victory on behalf of Coway before the Supreme Court in this high-profile patent dispute.

Lee & Ko’s IP Practice Group also successfully represented Wonik PNE in a case involving the unauthorized patent registration of a secondary battery activation device developed by one of its employees in the course of performing official duties, by leading the case from filing a patent ownership transfer suit to securing a favorable ruling on behalf of Wonik PNE. In addition, the group is at the forefront of protecting companies from the leakage or misappropriation of their core technologies through its active engagement in trade secret litigation. As additionally evidenced by a recent court victory on behalf of Naver, where the firm obtained an injunction against unauthorized crawling of real estate listing data, Lee & Ko continues to reaffirm its strong track record across the full spectrum of IP law, including patents, trade secrets, and copyrights. This year’s newly awarded Gold ranking in the prosecution category further highlights its deep bench and outstanding expertise throughout all facets of IP matters.

IAM is a global patent publication released every year that conducts surveys and interviews with patent experts and law firms all over the world, and ranks the best law firms and experts in the patent field by country and sector, based on submissions and client feedback.
2025.06.02
Lee & Ko Named “South Korea Firm of the Year” at Benchmark Litigation Asia-Pacific Awards 2025
Lee & Ko received the honor of “South Korea Firm of the Year” at the Benchmark Litigation Asia-Pacific Awards 2025.

Presented annually by Benchmark Litigation, a leading global publication dedicated to litigation and dispute resolution, the “South Korea Firm of the Year” is awarded to only one leading firm in each country in the field of dispute resolution. Lee & Ko, recognized consecutively from 2021 to 2023, has received the esteemed accolade once again, reaffirming its continued standing as a top-tier dispute resolution practice in South Korea. This recognition reflects the firm’s competence and excellence in handling complex dispute resolution matters, as notably demonstrated by the IP Practice Group securing a final victory for Coway in a prolonged, nearly 11-year infringement dispute with ChungHo Nais over ice-making water purifier technology.

In addition, two of the firm’s attorneys garnered individual honors: Miji Lee, a partner of the Antitrust & Competition Group was named to the “Top 100 Women in Litigation 2025”; while Joohye Hong, a partner of the Real Estate & Construction Group was selected for the “Top 40 Under 40 2025.”
Asia-Pacific’s “Top 100 Women in Litigation” recognizes 100 distinguished female professionals within the region, selected through months of in-depth research. Ms. Lee is a seasoned antitrust lawyer with extensive experience in advising and representing both domestic and multinational clients across the full spectrum of competition law matters, from initial investigations by the Korea Fair Trade Commission (KFTC) to successive stages of administrative, criminal, and other antitrust litigation.

On the other hand, Asia-Pacific’s “Top 40 Under 40” recognizes 40 lawyers, the most accomplished litigators under 40, selected through rigorous research and high evaluations. Ms. Hong is a construction and real estate specialist with strong industry experience in construction, real estate, energy, and social overhead capital (SOC) projects. Her practice includes negotiating EPC contracts related to the export of nuclear reactors to the Dukovany plant in the Czech Republic, providing regular legal counsel for overseas nuclear power plant exports for projects in the UAE and Saudi Arabia, and representing special purpose companies established for privately financed infrastructure projects such as railways, particularly in cases involving total project cost increases and insurance claims. She also provides guidance and legal representation on a wide range of construction-related matters, including disputes arising from power plant construction projects.

Benchmark Litigation annually hosts the Benchmark Litigation Asia-Pacific Awards, which recognize the most notable dispute resolution cases and law firms in the Asia-Pacific region each year, based on law firm submissions, interviews with litigation experts, and independent research.
2025.05.21
‘Benchmark Litigation Asia Pacific 2025’ ranks Lee & Ko in the top tier in 9 practice areas
Lee & Ko was selected as a Tier 1 law firm in Korea for the following 9 categories by ‘Benchmark Litigation Asia-Pacific 2025’, a world-renowned publication which highlights the fields of dispute resolution and litigation. 


 Commercial and Transactions
 Competition/Antitrust
 Construction
 Insolvency
 Intellectual Property
 Labor and Employment
 Product Liability and Recall
 Tax
 White Collar Crime

In addition, 51 Lee & Ko attorneys were selected as either ‘Litigation Stars’ or ‘Future Stars’ in recognition of their achievements in their respective fields.


- Litigation Star
 Competition/antitrust: Jangwoo Park, Jeong-Ho Sun, Pyoung Keun Song, Mi Ji Lee, Hwan Jeong
 Commercial and transactions: Won Seok Ko, Jae Heon Park, Dajoo Jung, Jin Soo Han
 Construction: Myung Jong Kim, Seon Tae Kim, Chanik Jang
 Intellectual Property: Un Ho Kim, Jae Hoon Kim, Keum Nang Park, Hayoun Chun
 International arbitration: Sang Hoon Han
 Insolvency: Wan Shik Lee, Jung Hyun Lee, Jiwoong Lim
 Labor and employment: Young Jin Kim, Hyunseok Song, Sang Hoon Lee, Chang Soo Jin
 Product liability and recall: Dajoo Jung
 Tax: Tom Kwon, Sung Hwan Kim, Ok Hyun Ma, Byeong Jun Son, Kyung Tae Kim
 White collar crime: Jae Deog Bae, Jin So, Tae Yop Lee, Young Sub Jang

- Future Star
 Competition/antitrust: Byong Ki Chung
 Construction: Janghee Yoon, Joo Hye Hong
 Intellectual Property: Hyeon Gil Ryoo
 International arbitration: Saemee Kim, Grace Yoon
 Labor and employment: William Kim
 Product liability and recall: Yangsuk Han
 Tax: Steve Minhoo Kim, Soo Hyuk Yim
 Future Star(Practice Not Stated): Se young Kang, Jaewoo Kwak, Ki Jung Sung, Soo Yeon Oh, Jung Ho Ryu, Kyeong-Seop Yoon, Kiri Yi, Gang Cheol Chu

Benchmark Litigation conducts its annual rankings based on in-dept analysis of law firm submissions and interviews with legal practitioners, clients, and litigation experts.
2025.05.08
Sunghee Chae, selected as 'Asia Super 50 TMT Lawyers 2025' by ALB
Asian Legal Business (ALB) has recognized Lee & Ko’s attorney Sunghee Chae as one of the ‘Asia Super 50 TMT Lawyers’ for 2025. 

Attorney Sunghee Chae is actively involved in several practice groups, including Technology, Media & Telecommunications (TMT), Data Protection & Privacy, IP, Fintech, Regulatory Compliance. Her practice focuses on compliance and advisory services related to data protection laws, digital finance, e-commerce, healthcare, and other IT regulations. Additionally, she handles intellectual property matters such as patents, trademarks, copyrights (including open-source software), trade secrets, and fair trade-related work. Ms. Chae has been advising on AI regulations and related contracts, and she is expanding her expertise in the aerospace regulatory field.

ALB Magazine published by Thomson Reuters is a legal magazine published in the Asian Pacific region, and has conducted the annual survey of Super 50 TMT Lawyers to name the most highly recommended TMT practitioners in the Asian region.
2025.03.27
7 Lee & Ko Lawyers Nominated as Thomson Reuters "Stand-out Lawyers 2025"
7 Lee & Ko lawyers have been nominated as “Thomson Reuter Stand-out Lawyers 2025”, a global media providing legal database. 

Thomson Reuters nominates the Stand-out Lawyers by receiving recommendations through the global Sharplegal study, which is conducted every year to more than 2,000 senior in-house counsels around the world. 

The list of the nominated lawyers is as follows: 

 Hyun Soo Park
 Hyung Soo Lee
 Hyunjoo Oh 
 Jun Woo Cho
 Miji Lee
 Tae Joo Kim
 Yunjeong Seo
2025.03.20
'Chambers Global 2025' Band 1 in 7 practice areas

Lee & Ko has once again been recognized by Chambers Global in 2025 for its outstanding legal services. In its latest 2025 edition, Chambers Global ranked the firm as a top-tier law firm(Band 1) across 7 practice areas. As for the individual rankings, 34 attorneys of Lee & Ko have been recognized as leading lawyers for their remarkable performance in their respective practice areas.

Firm Rankings
Banking & Finance
Capital Markets
Corporate/M&A
Dispute Resolution: Litigation
Intellectual Property
International & Cross-Border Capabilities: South Korean Firms
International Trade

Ranked Lawyers
Banking & Finance: Yeo Kyoon Yoon, Woo Young Jung, Yong-Jae Chang, Myoung Chul Kwak, Dong Seok Woo
Capital Markets: Hyunjoo Oh, Seunga Hyun, Jun Woo Cho
Capital Markets: Securitisation: Jin Hong Kwon
Corporate/M&A: Sanggon Kim, Hyeong Gun Lee, Ho Joon Moon, Yong Joon Yoon, Daehoon Koo, Hyung Sub Lim(Foreign Expert for North Korea)
Dispute Resolution: Arbitration: Saemee Kim, Sanghoon Han, Grace Yoon
Dispute Resolution: Litigation: Won Seok Ko, Pyoung Keun Song, Seong Won Chang, Dajoo Jung
IP: Jae Hoon Kim, Un Ho Kim, Keum Nang Park, Hyeon Gil Ryoo, Vera Eun Woo Lee, Jaewoo Kwak, Hankil D. Kang
International Trade: Kichang Chung, Young Gee Park, Young Jae Cho, Hyunsoo Joo, Heysoo Kim

Chambers Global Guide is a law firm evaluation publication released by Chambers and Partners, a leading global legal publisher based in England, which selects top law firms and top lawyers in the Asia-Pacific region each year based on a comprehensive analysis of data submitted by law firms, interviews with partner lawyers and clients, and recently accomplished work.
2025.02.14