LLB, Hanoi Law University
BA, People’s Public Security Academy
+84 24 3275 3958 
Linh Duy Mai is the head of intellectual property enforcement in Vietnam at T&G Law Firm LLC (TGVN), a licensed law firm and IP agent partnering with Tilleke & Gibbins for litigation and local IP filings. Linh is trusted by multinational clients to handle both contentious and non-contentious IP matters, with a practice that spans enforcement, disputes, and the strategic commercialization of intellectual property.
Linh has assisted clients across a wide range of industries—including automotive, software, pharmaceuticals, cosmetics, fashion, and food—in navigating complex IP issues in Vietnam. Beyond leading enforcement actions against IP infringement, he advises on sophisticated IP transactions and high-value projects, including technology development and commercialization arrangements, trademark structuring following joint venture exits, and IP due diligence for technology-driven investments.
He has particular experience in technically complex disputes, including patent infringement matters and copyright disputes involving software and source code. His work in this area includes assessing originality, substantial similarity, and ownership of protectable elements, often in cases involving overlapping commercial relationships and prior shareholder interests. He has also advised on issues relating to standard essential patents (SEPs) and FRAND licensing in cross-border contexts.
Recognized as a leading IP lawyer in Vietnam by Legal 500, Managing Intellectual Property, Benchmark Litigation, IAM Patent 1000 and WTR 1000, Linh combines legal precision with practical enforcement insight. His background in the Hanoi police force gives him a unique advantage in coordinating multi-agency actions and handling matters with potential criminal implications.
- Advised a leading U.S. multinational technology company on developing a defense strategy in a potential dispute concerning FRAND licensing of standard essential patents (SEPs), including analysis of licensing obligations and associated litigation risks.
- Advised on complex technology transfer arrangements, including assessing a client’s ability to enter into a proposed agreement with a Vietnamese partner in light of constraints under an existing license with the U.S. Department of Agriculture (USDA).
- Advised on and negotiated a complex agreement for the development and commercialization of a cryptocurrency trading platform, including IP ownership structuring and multi-party arrangements.
- Conducted comprehensive IP due diligence for large-scale and high-value projects, including core software and technology for a cryptocurrency platform in Vietnam and cutting-edge energy production technologies.
- Handled a complex copyright dispute involving an ERP software management system developed by a commissioned contractor, where the claimant alleged unauthorized copying of source code from a company in which the contractor was a former shareholder.
- Structured and negotiated trademark usage and coexistence arrangements following the exit of a joint venture partner, addressing residual goodwill, brand transition, and enforcement risk mitigation.
- Represented multinational clients in patent infringement and dispute matters, including pharmaceutical and agrochemical cases involving technical evidence and regulatory overlap.
- Won a domain name dispute case at the Ho Chi Minh City Court for a German auto manufacturer. The defendant was required to surrender the disputed domain names, make a public apology, and pay the client’s legal fees. This was the most severe punishment ever dealt out by a Vietnamese court to a cyber-squatter.
- Represented a world-leading ball bearing manufacturer to orchestrate an administrative raid. Approximately ten tons of counterfeit goods were seized. The infringer was then imposed with a record fine.
- Litigated on behalf of a U.S.-based raisin producer and won a challenging case in which the defendant raised a copyright registration as a defense to trademark infringement.
- Represented a world-leading manufacturer of coding, printing, and laser marking products and won a precedent-setting victory in which the court awarded record attorney’s fees to the plaintiff. Managing Intellectual Property magazine selected the victory as its Case of the Year for Southeast Asia in 2014.
- Represented one of the world’s leading biochemical corporations and secured a victory in a groundbreaking case of patent infringement in which the court agreed to enforce and protect an agrochemical patent for a foreign patentee against a local pesticide producer.
- Won the second domain name dispute case handled by the Vietnamese courts on behalf of a well-known French cement producer.
- Won a wide range of domain name disputes by virtue of UDRP proceedings before the WIPO Arbitration and Mediation Center.
- Assisted a British multinational pharmaceutical company in an unfair competition case involving the use of misleading trade dress by a local competitor. In a rare occurrence, the enforcement body in charge of resolving the case rendered the final conclusion in favor of the client without relying on an expert opinion from the Intellectual Property Office of Vietnam.
- Represented the world’s leading motorbike manufacturing company to enforce its rights against all types of infringement on a nationwide scale.
- Represented some of the world’s top pharmaceutical companies from Europe and the U.S. in fights against local generic companies which infringe the clients’ patents.
- Represented several leading software publishers to raid end-users and then force them to legalize unlicensed software and pay damages.