Ms. Duong Thi DUYEN

Duong Thi DUYEN is a senior associate with KENFOX and heads the trademark team of the firm.

DUYEN specializes in due diligence for high-value commercial transactions, and advising on commercial, energy (oil and gas and renewable energy), labor, corporate, environmental, and competition law. Prior to joining the firm, she was a senior associate at an international law firm in Vietnam.


DUYEN has extensive experience structuring and negotiating contracts for complex technology projects, IT agreements, intellectual property and technology licensing, e-commerce and consumer law issues. She has particular expertise in the electric vehicle sector, where she has been assisting a client on its contracts with key partners in relation to electric vehicle charge point infrastructure, as well as on consumer law issues. As an expert in data protection laws, she advises numerous clients on data protection compliance in light of the General Data Protection Regulation. She also has expertise in brand protection, and she and her team manage intellectual property portfolios on behalf of a wide range of clients.


DUYEN is recommended by independent legal directories for her commercial, information technology and intellectual property work. She has been described as “smart, approachable, responsive and easy to work with”, “an excellent negotiator” and “professional, pragmatic and knowledgeable”. She is also a recommended expert for data protection and IT, and has been identified as a thought leader in data industry.

  • Represented a manufacturer in negotiations with a labor union on strike. Successfully negotiated the terms of a collective bargaining agreement, thus expediting the conclusion of the strike.
  • Negotiated on behalf of a foreign company operating in the defence technology sector, a contract for the manufacture and supply of components and for the licence of technology.
  • Drafted template contracts for the supply of IT and telecoms services, including provision of cloud (SaaS and IaaS) and managed services, connectivity and data services.
  • Advised a US provider of big data analytics services on data anonymisation and handling under the EU data protection regime and on customer contracts and international data transfers.
  • Provided guidance to a well-known food products supplier on clearance searches for new brands.
  • Represented a manufacturer of specialist polymers for use in the opthalmic industry on a joint venture with a Dutch company, including drafting and negotiating associated technology licence and supply agreements.
  • Managed international trademark portfolio of over thousands of trademark files for domestic and multi-national companies, scientific research and business development incubators, private comprehensive, co-educational university focused on the scientific and medical fields.
  • Routinely guide clients through financing and re-financing transactions where intellectual property assets are leveraged as collateral. This includes international due diligence, assignments (and security interests) and licensing of trademark assets in client portfolios.