Dhenne Avocats is an independent Paris law firm dedicated exclusively to patent litigation and to the complex technical disputes that surround it. Founded in 2018 by Matthieu Dhenne, the firm acts before the French courts, the Unified Patent Court and the European Patent Office, as well as in arbitration and in coordinated cross-border proceedings.

The practice is deliberately narrow. Patent infringement and revocation actions, preliminary and protective measures, evidence gathering and saisie-contrefaçon, UPC strategy and case distribution, standard essential patents and FRAND disputes, supplementary protection certificates, trade secrets, employee inventions, damages assessment and IP arbitration. The firm is instructed by claimants and defendants alike, and is frequently brought in where the technical and procedural stakes make the outcome difficult to predict.

Clients are French and foreign companies operating in technically demanding fields: life sciences, including pharmaceuticals, biotechnology and medical devices, telecommunications, electronics, digital technologies, mechanics and industry. They include multinational groups, innovative mid-sized companies and research-driven businesses, often instructing the firm alongside patent attorneys and foreign counsel in multi-jurisdictional campaigns.

Three features distinguish the firm. First, the decision to litigate patents and nothing else, which allows every matter to be handled by lawyers who understand both the technology and the procedural architecture in which it is tested. Second, a genuinely European practice: the firm appears before the Unified Patent Court and follows its emerging case law closely, including on competence, case distribution and provisional measures. Third, a doctrinal depth that feeds directly into litigation strategy, arguments being built from primary sources rather than assembled from precedent alone.

Matthieu Dhenne, the founding partner, holds a doctorate in patent law and is a member of the Paris Bar and a representative before the Unified Patent Court. He is an Adjunct Professor at Paris-Panthéon-Assas University, where he teaches patent law and intellectual property litigation, an arbitrator with the ICC and the PMAC, an expert to the OECD and the Global Partnership on Artificial Intelligence, and the French contributor to the Kluwer Patent Blog. He has held research appointments at Columbia University, at the Max Planck Institute for Innovation and Competition in Munich, and at the Institute of Intellectual Property in Tokyo, where he is conducting a comparative study of injunctions in SEP and FRAND disputes in Europe, before the UPC and in Japan. He is the author or co-author of more than a hundred scholarly contributions, including the 2024 French patent law treatise published by LexisNexis and a forthcoming monograph on the contractual nature of FRAND commitments.

The firm works in French, English and German, and maintains close working relationships with patent litigation boutiques across Europe, the United States and Asia.