Charles (Chuck) Larsen - IP & Patent US Lawyer & English Solicitor - McDermott Will & Emery


As a US lawyer and English solicitor, Charles (Chuck) Larsen provides clients sophisticated multijurisdictional counsel in intellectual property portfolio strategy, transactions and disputes, with a particular emphasis in bioengineering and the medical technology space. He is licensed to practice before the US Patent and Trademark Office (USPTO), the European Patent Office (EPO), and the courts of England and Wales.

Chuck actively counsels on transatlantic disputes, including US District Court cases, Patent Trial and Appeal Board (PTAB) proceedings, Reexaminations, EPO Oppositions and litigation. His team is one of the first international practices to bring an action in Europe’s Unified Patent Court.

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  • Represented a global medical diagnostics company in structuring its IP portfolio for assertion in US litigation*
  • Represented a US medical technology company in European and US patent office disputes and litigation, and in strategic portfolio development to protect a cutting-edge cardiovascular technology*
  • Represented a US media company in defending its patent estate in numerous European opposition proceedings and in European litigation*

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  • The Best Lawyers in America, Patent Law, 2024
  • Intellectual Asset Management (IAM) Strategy 300, Global Leaders Guide, 2024
  • Intellectual Asset Management (IAM) Strategy 300, The World’s Leading IP Strategists, 2023
  • Managing Intellectual Property, IP Stars, 2023


Johns Hopkins University, Whiting School of Engineering, MS, Applied Biomedical Engineering, 2023
Duke University School of Law, JD, 2001
Brigham Young University, MA, English Rhetoric and Composition, 1998
Brigham Young University, BA, Chemical Engineering, 1996

England and Wales

US Patent and Trademark Office
US District Court for the District of Massachusetts
European Patent Office