Global Guide 2026 : France
Ranked Individual
Provided by CASALONGA
Founded over 150 years ago,CASALONGAis a leading European IP law firm consisting of more than 120 lawyers, trademark and patent 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 trademark and patent offices and regularly appear before the courts.
As such, CASALONGA was the first law firm to include both attorneys-at-law & trademark and patent 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 trademark and patent 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.
Provided by Chambers
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.
Provided by Chambers
CASALONGA represented Hasbro in an opposition before the French IPO.
Provided by Chambers
CASALONGA's strengths include timeliness, responsiveness, clarity of advice and quality of representation.
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.
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.
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.
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.
Provided by Chambers
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 is very accessible and has a great capacity to understand our business requirements. She knows how to break down complex matters in IP law.
She is highly competent and responsive. Her advice is invaluable. Her explanations were very educational.
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
Provided by CASALONGA
Marianne Gabriel
View profile of Marianne GabrielFrance 2026
Practice area: Intellectual Property
Location: France
View department profile for France 2026
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