Department profile
CASALONGA

Intellectual Property: Patents

France Guide 2026 : France

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CASALONGA

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About

Provided by CASALONGA

Founded more than 150 years ago, CASALONGA is a leading European IP law firm of more than 120 lawyers, patent and trademark attorneys, attorneys-at-law and engineers with offices in France (including Paris, Grenoble, Toulouse, Montpellier, Beaune, Pau, Nantes), Spain (Alicante) and Germany (Munich), as well as a global network of correspondents.


CASALONGA offers its clients full IP services, from prosecution and counselling to litigation, covering all types of IP rights (trademarks, patents, designs, domain names, copyright, etc.) and related laws (unfair competition, distribution, economic rights, etc.).


The firm's attorneys have extensive experience in proceedings before the patent and trademark offices and regularly appear before the courts.


As such, CASALONGA was the first law firm to include both attorneys-at-law & patent and trademark attorneys in France, creating a full-service IP firm whose clients do not have to engage different firms for prosecution and litigation. The combination of attorneys-at-law and patent and trademark attorneys enables CASALONGA’s teams to follow their client’s cases from the inception phase through any court proceedings and also provides more balanced advice, taking into consideration litigations risks.



Chambers Review

Provided by Chambers

Intellectual Property: Patents - France

What the Team is Known For

CASALONGA is a notable IP boutique that is well equipped to advise on contentious and non-contentious trade mark and patent mandates thanks to a large team of lawyers and trade mark and patent attorneys. The law firm assists with infringement and nullity proceedings, in addition to acting in opposition and unfair competition cases. Its client roster features companies from the pharmaceutical, energy and consumer goods sectors.

À propos de l’équipe

CASALONGA est un cabinet boutique de propriété intellectuelle renommé qui est bien équipé pour conseiller sur les mandats de marques et de brevets tant en conseils qu'en contentieux. Le cabinet d’avocats intervient dans des procédures de contrefaçon et de nullité, en plus d’intervenir dans des dossiers d’opposition et de concurrence déloyale. Sa clientèle comprend des entreprises des secteurs pharmaceutique, de l’énergie et des biens de consommation. L'équipe bénéficie également de l'implication de conseils en propriété industrielle spécialisés dans les marques et les brevets.

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Work Highlights

Provided by Chambers

  • CASALONGA represented Hasbro in an opposition before the

    French IPO.

  • CASALONGA a représenté Hasbro dans une opposition devant l’INPI français.

Strengths

Provided by Chambers

  • CASALONGA is highly responsive and has a thorough understanding of clients' workings and needs. The different skills within the team enable us to have an accurate and in-depth view of complex issues.

    Intellectual Property: Patents respondentFrance

  • The CASALONGA team is commercially aware of our risk tolerance level and provides practical advice. The law firm provides excellent services and is very responsive to timely requests.

    Intellectual Property: Patents respondentFrance

  • CASALONGA offers very quick and practical assistance. The expertise is obvious and the firm has a deep bench to assist in matters that come up unexpectedly.

    Intellectual Property: Patents respondentFrance

  • Whether in France or abroad, CASALONGA's mastery of trade mark law and the quality of its network of colleagues make it very reliable in providing good advice.

    Intellectual Property: Patents respondentFrance

  • CASALONGA's strengths include timeliness, responsiveness, clarity of advice and quality of representation.

    Intellectual Property: Patents respondentFrance
  • Les points forts de CASALONGA incluent la rapidité, la réactivité, la clarté des conseils et la qualité de la représentation.
    Intellectual Property: Patents respondentFrance

Notable Practitioners

Provided by Chambers

  • Marianne Gabriel
    Marianne Gabriel

    Marianne Gabriel

    Marianne Gabriel is adept at handling contentious patent matters for clients in the pharmaceutical and telecoms sectors. She has particularly strong expertise in FRAND, invalidity and nullity disputes.

    Marianne Gabriel est experte dans le traitement des dossiers litigieux en matière de brevets pour des clients des secteurs pharmaceutique et des télécoms. Elle dispose d’une expertise particulièrement forte en matière de contentieux FRAND, invalidité et nullité.

    • Marianne Gabriel is very smart and she really knows patent law, in the pharmaceutical field especially. She is very easy to work with and super diligent. She only has qualities.

      Intellectual Property: Patents respondentFrance

    • Marianne Gabriel is very accessible and has a great capacity to understand our business requirements. She knows how to break down complex matters in IP law.

      Intellectual Property: Patents respondentFrance

    • She is highly competent and responsive. Her advice is invaluable. Her explanations were very educational.

      Intellectual Property: Patents respondentFrance

    • Marianne Gabriel est très accessible et a une excellente capacité à comprendre nos besoins commerciaux. Elle sait comment simplifier les questions complexes en PI.

      Intellectual Property: Patents respondentFrance
    • Elle est très compétente et réactive. Ses conseils sont précieux. Ses explications étaient très instructives.
      Intellectual Property: Patents respondentFrance

    • Marianne Gabriel est très intelligente et a une excellente connaissance du droit des brevets, notamment dans le domaine pharmaceutique. Elle est très agréable à côtoyer et extrêmement consciencieuse. Elle n'a que des qualités.

      Intellectual Property: Patents respondentFrance
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Ranked Individuals at CASALONGA (1)

France

Members

Provided by CASALONGA

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