Jipyong LLC

Intellectual Property; Patents & Utility Models ㆍ Employee Invention; Trademarks & Design ㆍ Anti-Competitive Practices; Copyright; Trade SecretsㆍIndustrial TechnologyㆍBusiness Information Protection; Privacy & Data Protection; IP Management & Strategy Consulting Services; Disputes over Abuse of IP RightsㆍTechnology Theft; Unfair Trade PracticesㆍCustoms Clearance; IP Litigation; Corporate Advisory; Product Liability & Consumer Claims; Biotechnology, Pharmaceutical, Medical Device & Healthcare

Partner

Mr. Chang Ik Sung is a partner in the IP & Technology Team of the Litigation Group. Mr. Sung mainly advises and represents clients on IP rights, product liability issues, general civil and criminal proceedings, and family law and inheritance proceedings.

Previously, he served as a judge in the Patent Court and as a Chief Justice in the Ulsan District Court, and he has gained a wide range of legal experience from numerous top-tier domestic and international law firms.

He represents both domestic and international clients based on his experience as a judge and an attorney in the areas of IP, and general civil and criminal proceedings. He also serves as an arbitrator on the Korean Commercial Arbitration Board. He continues to actively research and publish on the topics of patent law as a member of the Korea Patent Law Society and the Korea Association for Info-Media Law.

2017-Present / JIPYONG LLC

2025-Present / Legal advisor, Gyeonggi-do (province)

2019-Present / Member, Donation Management Committee, Korea Institute for Advancement of Technology

2016-Present / Mediator, Patent Court

2015-Present / Mediator, Small & Medium-Sized Businesses Technical Dispute Mediation∙Arbitration Committee

2012-Present / Arbitrator, The Korean Commercial Arbitration Board

2022-2023 / Temporary Director, Education Foundation of Kyonggi University

2019-2021 / Auditor, Korean Intellectual Property Lawyers Association

2019-2021 / Legal Advisor, Personal Information Protection Commission

2018-2021 / Member, HR Committee I, Seoul City Government

2017 / Attorney at Law, Chang-Ik SUNG Office

2017-2018 / Advisor, Special Committee on Constitutional Amendment, National Assembly

2016-2021 / Director, Seoul Volunteer Center

2016-2019 / Mediator, Industrial Technology Dispute Mediation Committee

2014-2019 / Director, Korean Intellectual Property Lawyers Association

2012-2017 / Attorney at Law, One Law Partners, LLC

2011-2012 / Chairperson, Junggu Election Commission, Ulsan

2011-2012 / Presiding Judge, Ulsan District Court

2009-2011 / Judge, Patent Court

2007-2009 / Judge, Busan High Court

2004-2005 / Finnegan, Henderson, Farabow, Garrett & Dunner LLP (International Guest)

2001-2002 / Special Investigator, Cha Jung-Il’s Special Prosecution Team

2001 / Visiting Attorney, Matsuo & Kosugi, Japan

1999-2006 / Attorney at Law, Kim & Chang

1998-1999 / Judge, Seoul District Court, Southern Branch

1995-1998 / Judge Advocate Officer, Korean Air Force

Korean / English / Japanese

1995 / Admitted to bar, Korea

2017 / Future Integrated-Technology Program, College of Engineering, Seoul National University

2004 / Georgetown University Law Center (LL.M.)

1993 / Seoul National University (LL.B.)