Hanseul Ryu

Hanseul Ryu
Patent Attorney/Partner







Practice Area

  • Chemistry, Material Engineering, Pharmaceutics, Electronic cigarette, IP Financing, Clean Energy


  • 2023 Korea M&A Consultants
  • 2018 Admitted to the Korea Certified Valuation Analyst
  • 2012 Passed the Korean Patent Bar Examination


  • 2012 Seoul National University, College of Engineering (B.E., Material Science and Engineering)
  • 2005 Hansung Science High School

Hanseul is a partner attorney in field of chemistry, material engineering, pharmaceuticals, e-cigarettes at SEUM IP. He provides clients with counseling services on IP issues including patent portfolio development, prosecution, patent disputes, invalidation/infringement assessment and FTO analysis. In addition, he provides consulting services related to corporate patent strategy and IP financing.

Before joining SEUM IP, Hanseul filed and prosecuted patent applications and dealt with patent litigations at KIM & CHANG on behalf of global companies. While working for Shinhan Bank, he evaluated various companies (especially small and medium-sized enterprises (SMEs) and startups) and their technologies, and he provides customized IP consulting services based on his experience.

Hanseul provides advice on corporate IP management including establishing patent strategies, IP management process, and operating an employee invention remuneration system based on his experience as an in-house counsel at KT&G.

  • 2023-present
  • 2020-23
    KT&G Corp.
  • 2016-20
    Shinhan Bank
  • 2012-15
Representative Matters

[1] Building Patent Portfolios in the Field of Chemistry, Material Engineering, Pharmaceutics

  • For global chemical/material/pharmaceutical companies, consulting on patent application strategies and building patent portfolios 
  • For 3M, Bayer, Henkel, Toray, BASF, and DuPont, which are global major chemical companies respectively, built patent portfolios 
  • Prior art research and competitor patent trend research to determine the direction of R&D and patent application

[2] Infringement / validity analysis and Patent dispute

  • Advised B company on FTO(Freedom to Operate) analysis for fusion proteins for hemophilia, and  T company on FTO analysis for adhesive materials
  • Analysis of invalidity and possibility of infringement of various material/chemical patents, such as T company's reflective film patent and K company's artificial leather structure patent
  • Analyzed the invalidity of e-cigarette patents for global tobacco companies P and B, and Advised K company a patent portfolio for disputes with these patents
  • Represented B company in the patent trial related to thrombin inhibitor
  • Represented B company in the patent trial and lawsuit related to oxime ester derivatives

[3] Company's intellectual property management

  • Establishment patent application strategy and strengthen the patent portfolio  
  • Set the direction of corporate technology development and mitigate company’s patent risks
  • Managing patent application for e-cigarette device and tobacco
  • Reviewing of design around to competitors' patents and licensing of competitor's patent
  • FTO analysis for export products on overseas countries 
  • Improvement and operation of employee invention remuneration system

[4] IP Financing

  • Preparation of Tech Credit Bureau (TCB) for companies in various fields (manufacturing, contents/SW production, etc.)
  • Preparation of a technology evaluation report (biotechnology, mobile application, fintech, etc.) for the investment committee
  • Conducting corporate IP consulting and supporting financial instruments optimized for company’s IP
Publications and Activities
  • Vice Chairman, Korea M&A Consulting Association (KOMACA) (2023-Present)
  • Member of the Korea Valuation Association (KVA) (2018-Present)
  • Member of the Korea Patent Attorneys Association (KPAA) (2013-Present)
  • Korean, English