Ms Isabelle Leroux > Dentons > Paris, France > Lawyer Profile

75008 PARIS
Isabelle Leroux photo

Work Department

Intellectual Property, Technology & Communications (IPTC).


Isabelle Leroux is now a Senior Counsel in Dentons’ Paris office.


Isabelle is recognized in intellectual property law in France, Europe and Middle East.
She concentrates on intellectual property law and advises her clients on any issues relating to intellectual property: patents, trademarks, designs and models, copyright, domain names.
She also has extensive experience in coordinating international IP litigation in Europe, the Middle East countries and worldwide.
Her experience also includes advisory (licensing including know how, trade secrets and R&D, Trademark and Domain name clearances / Trademark and Design Filing programme, IP Due Diligence / Audit, IP rights financial evaluation and tax issues, Copyright issues, Unfair Competition, Comparative advertising, labelling etc.).
Isabelle is also an expert in the establishment of worldwide trademark and design registration strategies and programs.

Joined Salans (now Dentons) in 2011
Bird & Bird, Co-Head of the French IP department (2001 – 2011)
Dubarry Le Douarin, Head of IP Department (1997 – 2001) 


English French


Admitted to the Paris Bar in 1996
Former chairman of the French Trademarks and Internet Committee of the French Association of Practitioners in Trademarks and Designs (APRAM)
Former council member of the European Community Trademark Association (ECTA)
Member of International Trademark Association (INTA)
Member of the French Group of the International Association for the Protection of the Intellectual Property (AIPPI)
Member of the Pharmaceutical Trademark Group (PTMG)
Member of the Association for International Arbitration (AIA)
Member of the Asociación Interamericana de la Propiedad Intelectual (ASIPI)
Member of the International Intellectual Property Law Association (IIPLA)


D.E.S.S. in Intellectual Property

Lawyer Rankings

France > Industry focus > Industry focus: IT, telecoms and the internet

Dentons‘ senior counsel Isabelle Leroux recently obtained a favourable decision at the appeal stage of a software and unfair competition claim brought by Dassault on behalf of the Airbus Group, and David Masson is advising Nokia throughout Europe on the GDPR compliance of its recording of street-level data. The firm is also assisting Scalefast with all contractual issues relating to its cloud platform and e-commerce structure.

France > Industry focus > Industry focus: Luxury goods

Odile Caron is senior counsel within Dentons‘ commercial and distribution practice and a key name to note within the luxury group alongside intellectual property specialist David Masson, tax expert Sandra Hazan and corporate partner Jean-Marc GrosperrinPascal Chadenet is part of a multi-disciplinary team advising an independent designer fashion house on its strategic partnership with an international group, while Olivier Genevois assisted Piquadro with its acquisition of the entire share capital of Lancel. The team was recently strengthened by the arrival of Marianne Schaffner from Dechert LLP; she represented a heavyweight luxury client in a major cross-border trademark infringement and unfair competition action against a fashion group. Other key names include senior counsel Isabelle Leroux and Frédérique Meslay-Caloni, who is part of the employment and labour team.

France > Intellectual property > Intellectual property: Trade marks and designs

At Dentons, the intellectual property team recently gained Marianne Schaffner and her team, who arrived from Dechert LLP, as well as several new clients including Sandoz. Associate Clémence Boland – who arrived with Schaffner and Pierre-Olivier Ally – recently acted for Square in several trade mark infringement cases in the French and European courts, and senior counsel Isabelle Leroux is currently representing Merial in litigation against Virbac arising from the defendant’s registration of the European ‘Frontline’ mark. David Masson leads the practice and recently collaborated with counsel Clément Monnet to assist Polaroid with the protection and enforcement of all of its European assets, including R&D arrangements. Other key clients include Wavestone, CGI, Delta Air Lines and Lactalis.

France > Media and entertainment > Media and entertainment: advertising

Dentons‘ David Masson recently acted for several high-profile luxury brands on a host of issues pertaining to their advertising campaigns, including intellectual property, contentious and regulatory matters. Senior counsel Isabelle Leroux is currently advising a major food and drinks company on a free riding and copyright dispute arising from the broadcasting of one of its festive advertising campaigns, while counsel Clément Monnet is part of the team which provides ongoing advice to an international agency on a variety of issues, most recently regarding actions brought by parties alleging illegal advertising.

Paris > Secteurs et industries > Technologies de l’information, informatique, internet et télécoms

Chez Dentons, Isabelle Leroux (senior counsel) a récemment obtenu un arrêt favorable pour le compte d’Airbus, dans un contentieux en contrefaçon de logiciel et en concurrence déloyale au long cours, impliquant notamment Dassault. David Masson conseille Nokia sur la mise en conformité d’un système d’enregistrement avec les exigences du RGPD. Le cabinet conseille enfin Scalefast pour la gestion de toutes ses questions contractuelles touchant à ses plateformes cloud ou d’ e-commerce.