With a team that is ‘very knowledgeable both in domestic and overseas jurisdictions’, Yoon & Lee is a well-regarded patent prosecution firm, regularly active for both domestic and international clients. The firm is home to experts in the fields of chemistry, pharmaceuticals, mechanics, and cosmetics, among others. The ’extremely responsive and reliable’ team is especially skilled at handling trademark and design infringement cases. Dong-yol Yoon, managing partner and founder of the firm, has almost four decades of experience navigating the IP landscape, and has a focus on the chemistry and biotech sectors. Sang-yong Lee is in charge of the trademark and design team, while Byeong-ok Song focusses on matters within the mechanical sector. Ji-man Park heads the telecommunications division within the firm and is recommended for IP matters relating to major electronic companies. Other prominent members of the team include Yong-won Lee, who is at the forefront of the standard patent team, and Seong-ki Kim, a US attorney and Korean patent attorney, who joined from Lee & Ko in 2022.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- 'Yoon & Lee professionals provide regularly updated information, and are extremely responsive and reliable.'
- 'They have ample experience in working with international clients from large entities to small entities. Their members are technically sharp and legally up to date.'
- 'Their staff are very punctual, and their billing rate is very reasonable. Highly competent attorneys oversee every aspect of handling their IP matters.'
- 'All the attorneys are very knowledgeable, both in domestic and overseas jurisdictions.'
- 'Yoon & Lee responds to our inquiries in a timely manner and provides clients with professional and cost-effective analysis to help them adjust their patent filing strategy.'
- 'Dong-yol Yoon, the managing Partner of Yoon & Lee, leads his team effectively and professionally.'
Key clients
- Samsung Electronics
- Amore Pacific
- ASM
- Narae Nanotech
- Murata Manufacturing
- Adeka Corporation
- Nippon Steel Chemical
- Daio Paper
- Stripe Inc.
- Great Wall Motor
- Technofoam
- Saint-Gobain Performance Plastics
- NewSouth Innovations
- Sony Interactive Entertainment
- Reliance Industries (India)
- Hangzhou Hikvision Digital Technology
- Gachon University
- Korea Electronics Technology Institute
Work highlights
- Obtained a patent for a medical device for Blink Device LLC.
- Successfully appealed against the rejection of an industrial design application by KeepCut Pty Ltd before the Appellate Board.
Lawyers
Hall of Fame: PATMA
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.
Leading partners: PATMA
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Byeong-ok Song
Yoon & LeePractice head
The lawyer(s) leading their teams.
Ji-man Park, Yong-won Lee, Byeong-ok Song, Sang-yong Lee, Dong-yol Yoon