Trust and client focused - World-Class Law Firm based in Korea



DONG OH HONG / Partner



Dong Oh Hong is a partner at Yoon & Yang LLC. Hong’s practice is focused on intellectual property. He has years of experience litigating every issues related to intellectual property rights. He has successfully represented SK Energy, Phillips, Memminger-IRO GmbH, Dr. Karl Thomae GmbH, Daesung Electric, Salvatore Ferragamo, Ilshin, Honeywell Korea, Incheon International Airport Corporation, and Worlvi Trading. He serves as the secretary of the Intellectual Property Community under the Seoul Bar Association.


Seoul National University of Technology, Department of Electronic Engineering, B.E.E.
Yonsei University, Graduate School of Engineering, M.E.E.
Seoul National University College of Law, LL.B.


Partner, Yoon & Yang LLC (formerly Yoon Yang Kim Shin & Yu, 2006-2009)
Asialaw leading lawyer in Intellectual property
Advisory Member, Legal Counsels for Small and Medium Business Overseas Expansion
Named in Euromoney Legal Media Group’s AsiaLaw Leading Lawyers
Commissioner, Korea International Trade Law Association
Member, Korea Trademark & Design Association
Member, International Investment/Intellectual Property Rights Legal Advisory Board, Ministry of Justice
Public Defender, Seoul Central District Court
Instructor, Korea Invention Promotion Association
Administrator, Intellectual Property Community, Seoul Bar Association
Associate, Yoon & Yang LLC
Associate, Central International Law Firm
Associate, Yoon & Partners
Completed the 26th class of the Judicial Research and Training Institute
Passed the 36th Korean Bar Examination


  1. “Does the right to request the registration of transfer of trademark right expire under the statute of limitations?,” Annotations on Court Precedents, Trademark Academic Society, 2015
  2. "Korea Chapter," LexisNexis Intellectual Property Law Guide 2013/14 (co-author), 2014
  3. “Cases Where Dereliction of Duty Is Not Established When Technical Information That Is Unlikely Deemed Invention Is Assiged to a Third Party and the Relevant Patent Is Registered by Such Third Party, Case Study, 2014
  4. "International Briefings," Managing Intellectual Property, 2013, 2014 
  5. “Whether the Use of Flow-forwarding Type of Domain Name Falls under Confusion of Business Entity,” 2013
  6. “Panel Discussion on Protection of Product Form: Judiciary Training Session at the Judicial Research and Training Institute,” Korea-US IP Judicial Conference, 2013
  7. “Cases where Exercising Rights based on Trademarks or Unfair Competition Behavior Violates Principle of Good Faith,” 2013
  8. “Case on a Trademarks Infringement Dispute regarding a Decoration on Shoes,” 2012 
  9. “Examination of Possibility of Exclusive Protection of an Antenna Shape,” 2011
  10. “Requirements for Extension of Protection Period for New Technologies under Section 6 of the Guideline for the Electric Technology Management Act promulgated by the Ministry of Knowledge Economy,” 2011
  11. “Standards for Activities Provided in Sections 2(i)(d), (2(i)(e), and 2(i)(f) of the Unfair Competition Prevention Act,” 2011
  12. “Examining the Possibility of Exclusive Protection on the Shape of an Antenna,” 2011
  13. “A Study on Misleading Acts under the Unfair Competition Prevention Act,” 2011
  14. “Application Facilities and Manufacturing Faciliites in Determination of Requirements for Interchangibility according to the Doctrine of Equivalents,” 2007 
  15. “The Theory of the Time of Application and the Theory of the Time of Manufacturing in Determining Requirements of the Known Interchangeability of the Doctrine of Equivalents,” 2007
  16. “Standard Precedents Acknowledging Substance of Invention in Determining Progressivity,” 2007

Representative Matters

  • Represented SK Energy and SK Innovation in a patent infringement case, patent registration invalidation case, and unfair competition case related to secondary batteries
  • Represented Philips in a patent registration invalidation case
  • Represented HTC in a patent infringement case
  • Represented Memminger-IRO GmbH in a patent infringement case and a damages case
  • Represented Dr. Karl Thomae GmbH in a patent registration invalidation case
  • Represented Daesung Electric in a utility model right infringement case
  • Represented Salvatore Ferragamo in a trademark infringement case and an unfair competition case
  • Represented Ilshin in an unfair competition case
  • Represented Samdai Electric in an unfair competition case
  • Represented Incheon International Airport Corporation, Worlvi Trading, Nowarch, etc. in copyright infringement cases, etc.



Practice Area

Recent MattersMore


  • Attorney at Law, Korea (1997)
    Patent Attorney, Korea (1999)


  • Korean, English, and Japanese


  • 2014 Selected as one of Asialaw Leading Lawyers by Euromoney Legal Media Group
  • 2016 Selected as leading lawyer in intellectual property by Asialaw
  • 2017 Selected as leading lawyer in intellectual property by Asialaw
  • 2018 Selected as leading lawyer in intellectual property by Asialaw

18th, 19th, 22nd, 23rd, 34th Fl., ASEM Tower 517 Yeongdong-daero, Gangnam-Gu, Seoul 135-798, Korea / Tel:+82-2-6003-7000 / Fax:+82-2-6003-7800

Yoon & Yang Pro Bono Foundation

Web Accessibility

Yoon & Yang LLC has developed its website in accordance with web accessibility guidelines to ensure an equal access to web services for the people with disabilities. Yoon & Yang LLC is committed to continuously improving its website for the convenience of all users.