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Mark Jansen torso

Mark Jansen

Partner
Intellectual Property
Industry Co-Leader
GamesBlockchain & Cryptocurrency

Mark works with some of the world’s best-known tech brands to develop worldwide branding strategies, including helping his clients select, develop, expand and protect their valuable IP assets. With a focus on delivering creative and practical business-focused advice, Mark counsels clients in connection with everything from complex trademark acquisitions and multijurisdictional disputes, to global portfolio management, licensing, anti-counterfeiting strategy, and developing domain name portfolios.
 

Mark provides practical and strategic counsel that takes into account the long-term value for the business.” "Mark demonstrated expertise, professionalism and attention to detail throughout the process.”
Chambers USA, Client Quotes
2025 Edition

Mark has extensive experience working with cutting-edge companies that are improving lives through technological innovation and disrupting industries, including those in the artificial intelligence (AI), blockchain, virtual, augmented, and mixed reality, computer vision, autonomous vehicle, robotic and e-commerce industries. He also regularly counsels clients in the social media and internet space, both advising platforms in trademark matters and helping brand owners navigate social media.

Mark is recognized as a leading trademark professional by Managing Intellectual Property, which shortlisted him for Trademark Practitioner of the Year - United States in 2023 and 2025, named him a notable practitioner (2021-2025) and to its Rising Stars list (2019-2020). World Trademark Review 1000 recognizes Mark for enforcement and litigation as well as prosecution and strategy in New York. Chambers USA recognized Mark as a leading lawyer in New York for trademark, copyright, and trade secrets transactional work in 2025. Super Lawyers honored Mark among the leading intellectual property lawyers in Northern California from 2017 through 2021. Since 2022, Mark has been recognized annually as a key lawyer by The Legal 500 in intellectual property: trademarks. World IP Review named Mark to their Outstanding category for non-contentious trademark work in the USA in 2023, 2024, and 2025 as well as naming him as one of the world’s top IP lawyers in 2024. Huski.ai’s data-driven analysis of USPTO filings ranked Mark as the number one trademark attorney for Web3 in 2022 and among the top ten AI attorneys in the US in 2023. In 2024, Mark was named a Rising Star by New York Law Journal. 
 

  • Bored Ape Yacht Club
  • Cisco Systems
  • Coinbase
  • Docusign
  • Harry's
  • Meta
  • Oculus VR
  • Palantir
  • Peloton
  • Polkadot and Kusama
  • Polygon
  • Twitter
  • "Best practice: managing a worldwide trademark portfolio - how to strike the right balance between commercial opportunities and legal requirements," WIPR Trademarks North America, 2023
  • "Best Practices in Domain Name Management," WIPR Trademarks North America, 2023
  • "IP and Innovation - Future Proofing Your Business In The Digital World," INTA Annual Meeting Live+, 2023
  • "NFT’s, IP, and Entertainment Law," NFT.NYC, 2023
  • "Annual U.S. Trademark Case Law Review," INTA Roundtable, 2023
  • "Trademarks and Non-Fungible Tokens," USPTO Roundtable, 2023
  • "Developments in Trademark Prosecution," CLE International's IP & Ski, 2023
  • "Trademark Issues in Licensing," Practising Law Institute, 2022
  • "Web3's Evolving Legal Landscape," The Gateway - NFT now, 2022
  • "Intellectual Property Topics in Web3," University of Michigan Law School, 2022
  • "NFTs: Legal and Practical Considerations for Protecting Your Brand," LexisNexis, 2022
  • "Understanding the Intellectual Property License," Practising Law Institute, 2021
  • "Intellectual Property, Regulatory and Ethical Considerations for Artificial Intelligence/Machine Learning Webinar Series," Fenwick, 2021
  • "Landslide: Brand Enforcement in the World of GDPR: Lessons Learned and Best Practices for IP Practitioners," American Bar Association, 2019
  • "Navigating Through the Invention Process: From Idea to Product to Market," USPTO, 2019
  • "Intellectual Property Law Institute: ICANN Developments," Practising Law Institute, 2018
  • "140th Annual INTA Meeting: Panel on Practical Lessons, Takeaways and First-Hand Experience Relating to IP Enforcement in Social Media," INTA, 2018
  • "Mergers, Acquisitions, and Divestitures: Managing Domain Names and Social Media Accounts in Transactions," INTA, 2018
  • "M&A Due Diligence: Key Components and Considerations Explored," The Knowledge Group, 2018
Mark demonstrated expertise, professionalism and attention to detail throughout the process.”
Chambers USA, Client Quotes
2025 Edition