Danny Yoon

Danny Yoon
Patent Attorney/Partner







Practice Area

  • Software, Robot, Mobile Service, Electronic Device
    Fashion, Entertainment


  • 2001 Passed the Korean Patent Bar Examination


  • 2019 Korea National Open University, College of Social Science (LL.B., Law)
  • 2002 Seoul National University, College of Engineering (B.E., Electrical Engineering)
  • 1995 Seoul Science High School


Korean, English, and Japanese

Danny works at SEUM IP on patent matters in the fields of computer software, mobile services, robots, medical devices and business models, and also works on trademark matters in the fields of fashion, entertainment and mobile services.  Danny filed and prosecuted patent applications, dealt with patent litigations, and protected trade secrets at KIM & CHANG on behalf of global companies, and built patent portfolios for many Korean domestic companies at SU IP and MOA IP and shared experiences with the clients while they grew up and achieved business exits.

Danny has a variety of experiences in purchasing / selling patents and purchasing trademarks, and has contributed to the clients' success in IP disputes and contracts by tough and moderate negotiation strategies.

  • 2021-Present
  • 2016-21
    MOA IP
  • 2006-16
    SU IP
  • 2003-06
  • 2002-03
    NAM & NAM
Representative Matters

[1] Handling patent disputes in the fields of software and electronic devices

  • Represented Naver, Fairchild, Applied Materials, LG U+, Hitachi, Toshiba, etc.
  • Represented Korean and foreign companies (S company, X company, T company, B company, etc.)

[2] Handling trademark disputes in the fields of fashion, entertainment and information technology

  • Represented Samsung Corporation, Handsome, YG Entertainment, etc.
  • Represented Fast Retailing, 10 corso como, IRO, Carven, etc.
  • Supervised Qoo10 trademark litigations in China
  • Purchased trademarks and negotiated for licensing deals in relation to disputes

[3] Building global patent portfolios and preparing for patent disputes

  • Represented SiRF against Qualcomm for GPS patents, and purchased patents for defensive use
  • Filed and prosecuted patent applications related to Android OS licenses on behalf of Microsoft
  • Filed and prosecuted search advertisement patent applications to be licensed out, on behalf of Overture
  • Filed and prosecuted patent applications for BYD
  • Built patent portfolios for Korean famous startups (O company, B company, C company, H company, etc.)

[4] Building patent portfolios for startups' business exits

  • Represented W company till its being listed in Kosdaq
  • Assisted O company till its being merged and acquired by a foreign large company
  • Assisted K company till its being merged and acquired by a Korean large company

[5] Assisting startups to do IP-driven growth

  • Co-developed patents for outbound licenses on behalf of M company
  • Co-developed patents and helped them be sold to Kosdaq-listed D company
  • Assisted K company in selling off its patents to Naver
  • CEO of Secondhands Inc. (2019-Present)
  • Co-founder & Partner at Futureplay Inc. (2014-19)
  • External Consultant for KOCCA (2010-Present)
  • Member of the Korea Patent Attorneys Association (KPAA) (2004-Present)