YOON&YANG

Sejung Lee Partner

TEL 82 2 6003 7079
FAX 82 2 6003 7029
E-MAIL sejunglee@hwawoo.com

Sejung Lee is a partner at Yoon & Yang LLC. Her main practice areas include intellectual property and antitrust and competition.
Ms. Lee advises clients in connection with intellectual property matters, including patent, trade secrets, industrial technology, copyrights, trademarks, design rights, unfair competition, and related litigation. Furthermore, she advises on antitrust and competition issues such as abuse of market dominance and unfair trade practices. In particular, she is experienced in antitrust regulations related to intellectual property.

Experience

2007-present Yoon & Yang LLC
2013-14 Finnegan LLP Reston, VA

Education

2013 Boston College Law School, LL.M.
2011 Seoul National University, Graduate School of Law (LL.D. course completion)
2007 Judicial Research and Training Institute
2005 Seoul National University, Graduate School of Law, LL.M.
2000 Seoul National University, College of Law, LL.B.

Representative Matters

Advised shipping company in connection with repairs of defects in LNG carrier cargos and represented the shipping company in foreign arbitration in connection with investigations into alleged violation of the Industrial Technology Protection Act, advised on approvals and reporting of national key technology exports, and domestic litigation
Handled the IP due diligence related to M&A of a semiconductor equipment & parts company
Assisted the investigation of trade secret and industrial technology appropriation for a leading semiconductor company
Assisted and represented a laser medical device company in a patent dispute filed with the US ITC and in Korea
Advised and represented SK Innovation in the United States and Korea in connection with trade secret and patent disputes with LG Chem concerning rechargeable batteries
Advised Qualcomm (a standard essential patent holder) on administrative litigation concerning the Korea Fair Trade Commission’s investigation into Qualcomm’s licensing practices and the chip industry
Advised leading steel company on compliance and assessment of dispute risks relating to intellectual property
Advised SK Hynix in t trade secret infringement lawsuit relating to NAND flash memory filed in the US and Japan
Represented SK Innovation in the case seeking adjudication on patent infringement dispute regarding lithium ion rechargeable battery membranes
Advised domestic semiconductor company on overseas intellectual property dispute risks, including compliance issues such as preservation and management of documents
Advised and represented three major television networks in the case seeking prohibition of simultaneous retransmission of programs (copyrighted works) against major cable networks
Represented OTO Melara in domestic litigation as well as arbitration in Paris in connection with trade secret infringement relating to gunfire manufacturing technology
Represented and advised Korean and foreign film companies in seeking injunction against webs storage device operators for copyright infringement and compensation for damages
Represented an internet portal service company in connection with its liability for copyright infringement by its users
Represented a German company against allegations of patent infringement concerning automatic waste collection facilities
Represented a pharmaceutical company in Korea Fair Trade’s investigations into alleged unfair trade practices

Awards

Litigation Star, Intellectual property, Benchmark Litigation Asia-Pacific (2024)
Trade Mark Star, MIP IP Stars (2020-2022)
40 Under 40, Asian Legal Business (ALB) (2016)

Publications

Korea Chapter, Trade Marks & Copyright, Chambers Global Practice Guides, Chambers and Partners (Co-author, 2024)
Korea Chapter, Copyright, Chambers Global Practice Guides, Chambers and Partners (Co-author, 2021-2023)
Korea Chapter, Trade Secrets, Chambers Global Practice Guides, Chambers and Partners (Co-author, 2020-2023)
Neutralization Of Technical Protection Measures, Law & Technology Vol. 5 No. 1, pp.153~pp.160, Seoul National University Center for Law & Technology (2009)
A Study on the Principle of Change of Circumstances, Seoul National University, LL.M. Thesis (2005)