Stanislas Roux-Vaillard

Stanislas Roux-Vaillard


Email [email protected]​

Phone +33 1 53 67 18 87

Fax +33 1 53 67 47 48

LanguagesEnglish, French, German

Practice groupIntellectual Property, Media, and Technology

'One of the best' in patent litigation

Chambers Global

Stanislas brings insight to clients willing to take advantage of French patent law. 

As the partner leading the IPMT team in the Hogan Lovells Paris office, Stanislas is an experienced patent litigator mainly involved in national and multi-jurisdictional patent litigations, mediations and arbitrations, representing international clients, notably in the field of life sciences and telecommunications.

Admitted to the Paris Bar, he represents clients by advocating in IP French courts, on first instance and on appeal.

With a network of talented patent litigators worldwide, Stan also takes part in the conception and execution of the multijurisdictional strategies of clients, along the specifics of their industry and business model. He is involved in a number of pharma and biotech cases helping clients make the most of their patent exclusivity. He and his team collected the highest award for patent infringement in France and in Europe. He represents clients in the telecom industry in contractual defences to standard essential patents and in non-essential patent claims brought by non-practicing entities.

In specific chemistry and mechanical engineering cases, his ability to use evidence gathering tools such as the 'saisie-contrefaçon' helped clients gain leverage for early settlement of infringement situations. Stan is also involved in patent portfolio and know-how review and licensing, notably in corporate deals where IP valuation is key.

He regularly writes articles on intellectual property developments in France. Stan is the author of the 'France' chapter of The Intellectual Property Law Review (Law Business Research Ltd) and is a research partner of the ABA Section of International Law.

Awards and recognitions


Intellectual Property: Patents (France), Band 3
Chambers Global


Intellectual Property: Patents, Leading Individual
Legal 500 EMEA


Intellectual Property: Patents (France), Band 3
Chambers Europe


Patents: Litigation, Band 2 - Excellent
Décideurs Magazine


Intellectual Property Law (France)
Best Lawyers


Litigation: Lawyers (France)
JUVE Patent


Gold - Individuals: litigation (France)
IAM 1000


Patent contentious - law firms (France)


Managing IP Awards (EMEA): France
Impact Case: Eli Lilly vs. Fresenius Kabi

Education and admissions


Doctorat, Université Paris II Panthéon-Assas, 2001

LL.M., John Marshall Law School - Chicago, 2000


EPLAW (European Patent Lawyers Association)

APEB (Association des Praticiens Européens des Brevets)

AIPPI (International Association for the Protection of Intellectual Property)

Bar admissions and qualifications


Representative experience

Representing a US pharma company to enforce its patent rights on an oncology combination and collecting €28m.

Representing a French pharma company in defending a €1.5m claim initiated by a competitor post preliminary injunction proceedings.

Representing a global leader for CAD software in a trade secrets misappropriation case and collecting €5.7m on appeal.

Assisting and representing a Taiwanese smartphone manufacturer in defending its freedom to operate against essential/non-essential patent infringement claims brought by a competitor.

Assisting a chemical company in a mediation to settle an ownership dispute regarding results of a co-development project on microwave activation of HDPE.

Successfully representing a medical device company in defending against two preliminary injunctions and a case on the merits, thus securing freedom to operate in France. 

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