Department profile
Dentons

Intellectual Property: Patents

France Guide 2026 : France


Dentons

Rankings

About

Provided by Dentons

Dentons’ Paris IP / Technology team advises French and international corporates, technology businesses and brand‑driven groups on the protection, exploitation and enforcement of their intellectual property and technology assets. Led by Partner Loïc Lemercier, the 4‑lawyer team covers both contentious and non‑contentious IP / IT work across sectors including life sciences, luxury, telecoms, electronics, software, gaming, media, food and beverage and automotive.

The team combines strong patent, trademark, copyright and designs litigation capabilities with contractual, licensing and advisory support. It acts before French courts, EU bodies (including EUIPO) and international institutions such as WIPO, and is able to represent clients before the Unified Patent Court (UPC) on pan‑European patent disputes.

    • Patent litigation and UPC work
    • Trademarks, designs and copyright
    • Unfair competition and trade secrets
    • IP transactions, R&D and licensing
    • IP strategy and portfolio management
    • Online, platforms and domain names
    • Sector‑focused advisory work

Clients (5)

  • CNRS
  • Merial
  • IDEAT Editions
  • John Galliano
  • Novartis

Industries (11)

  • Chemicals
  • Construction
  • Food and beverage
  • Entertainment
  • Information technology
  • Luxury & Fashion
  • Life sciences/Pharma
  • Mechanicals
  • Telecommunications and Media
  • Retail
  • Manufacturing

Chambers Review

Provided by Chambers

Intellectual Property: Patents - France


What the Team is Known For

Dentons houses a respected practice providing a wide range of services in the field of IP. The firm notably advises clients on patent and trade mark infringement matters and disputes. The team also assists with mandates related to unfair competition and oppositions. It is experienced in the technology, pharmaceutical and fashion industries. The department acts for both domestic and international clients, frequently coordinating with the firm's network to further assist with multi-jurisdictional issues.

À propos de l’équipe

Dentons est un cabinet respecté qui offre une vaste gamme de services dans le domaine de la propriété intellectuelle. Le cabinet conseille notamment ses clients en matière de contentieux et de contrefaçon de brevets et de marques. L’équipe intervient également dans le cadre de mandats liés à la concurrence déloyale et aux oppositions. Il est expérimenté dans les industries de la technologie, de la pharmacie et de la mode. Le département agit pour des clients nationaux et internationaux, en coordination fréquente avec le réseau du cabinet pour aider à résoudre des questions cross-border.

Work Highlights

Provided by Chambers

  • Dentons represented Softbox in a dispute against Thales regarding patent infringement claims and validity analysis.

  • Dentons a représenté Softbox dans un litige l'opposant à Thales concernant des allégations de contrefaçon de brevets et une analyse de validité.

Strengths

Provided by Chambers

  • Dentons manages multi-jurisdictional IP issues efficiently and provides clear, business-oriented solutions. Its well-rounded team has solid international reach and strong coordination across offices.

    Intellectual Property: Patents respondentFrance
  • Dentons is highly strategic, responsive and able to handle complex cross-border patent issues with strong commercial insight. The lawyers combine deep legal expertise with technical understanding.

    Intellectual Property: Patents respondentFrance
  • Dentons is exceptionally knowledgeable, practical and ethical. The team provides advice that is clear, concise and easy to implement.

    Intellectual Property: Patents respondentFrance
  • Dentons' IP team takes commercial opportunities into consideration. It is a solution-oriented team where questions are understood and responses are quick.

    Intellectual Property: Patents respondentFrance
  • Dentons' team is knowledgeable and experienced from the senior partners down to the associate lawyer level.

    Intellectual Property: Patents respondentFrance
  • L'équipe de Dentons est compétente et expérimentée, des associés principaux aux avocats collaborateurs.
    Intellectual Property: Patents respondentFrance

Notable Practitioners

Provided by Chambers

  • Band 4Isabelle Leroux
    Band 4Isabelle Leroux

    Isabelle Leroux

    Isabelle Leroux draws upon her wealth of knowledge to advise clients on cross-border copyright and trade mark disputes. She is also experienced in unfair competition and infringement actions.

    Isabelle Leroux s’appuie sur la richesse de ses connaissances pour conseiller ses clients dans le cadre de litiges cross-border en matière de droits d’auteur et de marques. Elle a également une expérience des actions en concurrence déloyale et en contrefaçon.

    • Isabelle Leroux has been a great support throughout the process.

      Intellectual Property: Patents respondentFrance
    • She is pleasant and efficient.

      Intellectual Property: Patents respondentFrance
    • Elle est agréable et efficace.

      Intellectual Property: Patents respondentFrance
    • Isabelle Leroux a été d'un grand soutien tout au long du processus.

      Intellectual Property: Patents respondentFrance
  • Band 4Loïc Lemercier
    Band 4Loïc Lemercier

    Loïc Lemercier

    Loïc Lemercier demonstrates particular strength in patent-related matters, notably patent litigation, protection and infringement actions.

    Loïc Lemercier fait preuve d’une force particulière dans les questions liées aux brevets, notamment les litiges, la protection et les actions en contrefaçon de brevets.

    • We highly appreciate working with Loïc. He has a deep understanding of IP law and a unique ability to communicate complex issues in a straightforward, accessible manner,

      Intellectual Property: Patents respondentFrance
    • Loïc Lemercier's advice is not only legally sound but also tailored to our business needs and risk profile. His ability to navigate complex, cross-border matters is especially valuable.

      Intellectual Property: Patents respondentFrance
    • Loïc is one of the most competent and knowledgeable lawyer we have worked with. He consistently provides results that exceed expectations.

      Intellectual Property: Patents respondentFrance
    • Loïc provides us with timely, responsive, practical advice.

      Intellectual Property: Patents respondentFrance
    • Les conseils de Loïc Lemercier sont non seulement juridiquement solides, mais aussi adaptés à nos besoins commerciaux et à notre profil de risque. Sa capacité à gérer des dossiers complexes et transfrontaliers est particulièrement précieuse.
      Intellectual Property: Patents respondentFrance
    • Loïc est l'un des avocats les plus compétents et les plus expérimentés avec lesquels nous avons collaboré. Il obtient systématiquement des résultats qui dépassent nos attentes.
      Intellectual Property: Patents respondentFrance
    • Loïc nous fournit des conseils opportuns, pertinents et pratiques.

      Intellectual Property: Patents respondentFrance
    • Nous apprécions énormément de travailler avec Loïc. Il a une connaissance approfondie du droit de la propriété intellectuelle et une capacité unique à communiquer des questions complexes de manière simple et accessible.

      Intellectual Property: Patents respondentFrance

Ranked Individuals at Dentons (2)

France

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