The 20 Best Intellectual Property Lawyers in France in 2026
Grégoire Desrousseaux is among the professionals included in the ranking compiled by Impact Lawyers.
| Lawyer | Firm | Primary profile |
|---|---|---|
| Grégoire Desrousseaux | August Debouzy | Patents and technical litigation |
| Laëtitia Bénard | A&O Shearman | Patents and life sciences |
| Denis Monégier du Sorbier | HOYNG ROKH MONÉGIER | Patent litigation |
| François Pochart | August Debouzy | Pharmaceutical patents |
| Grégoire Triet | Taliens | Patents and international litigation |
| Sabine Agé | HOYNG ROKH MONÉGIER | Patents and life sciences |
| Pauline Debré | Linklaters | Patents and technology |
| Jean-Hyacinthe de Mitry | Gide Loyrette Nouel | Patents and industrial property |
| Thomas Bouvet | Jones Day | Patent litigation |
| Denis Schertenleib | Schertenleib | Patents and procedural strategy |
| Arnaud Casalonga | Casalonga | Industrial property |
| Raphaëlle Dequiré-Portier | Gide Loyrette Nouel | Patents |
| Emmanuel Larere | Gide Loyrette Nouel | Industrial property |
| Anne-Charlotte Le Bihan | Bird & Bird | Patents and life sciences |
| Thierry Lautier | Bird & Bird | Patent litigation |
| Benjamin May | Jeantet | Patents and technology |
| Marianne Schaffner | Gowling WLG | Patents and litigation |
| Stanislas Roux-Vaillard | Hogan Lovells Cadwalader | International patents |
| David Por | Clifford Chance | Intellectual property |
| Marianne Gabriel | Casalonga | Patents and trademarks |
How the ranking was compiled
This ranking does not reproduce the order of any directory. Impact Lawyers has cross-referenced individual recognitions from Chambers France, Legal 500, Leaders League, and other professional sources, and subjected them to its own editorial weighting. The baseline industry source can be consulted here.
The assessment combines cross-recognition and continuity across directories (30 %), complexity and relevance of verifiable practice (25 %), technical specialization in patents, trademarks, copyright, trade secrets, and technical litigation (20 %), professional leadership and independence (15 %), and international, academic, or institutional standing (10 %).
Impact Lawyers' own criteria
External bands and categories are used as evidence, not as an outcome. Firm recognition does not automatically transfer to the lawyer, and notoriety does not replace specialization. The ability to personally lead matters, build a distinctive practice, and work across domestic and international contexts is also valued.
This methodology explains why the list and ranking order do not fully coincide with Chambers, Legal 500, or Leaders League. Directories typically rank firms, divide professionals into groups without an internal ranking, and depend on submission processes. Impact Lawyers translates those signals, together with editorial review, into an individual selection.
Featured professionals
Grégoire Desrousseaux stands out for the balance among career track record, specialization, leadership, and sustained recognition. Laëtitia Bénard and Denis Monégier du Sorbier are also among the featured professionals in this selection. Differences between closely ranked profiles can be narrow.
How it should be interpreted
The ranking expresses an overall assessment based on public information available in 2026. It does not measure fees, does not guarantee results, and does not assert that an included professional is the best choice for any given matter. The specific selection must take into account the dispute, sector, jurisdiction, availability, language, budget, and the relationship of trust.
Professional career paths may change. Prior to publishing future updates, it is advisable to verify partner movements, new structures, and potential conflicts of interest. The 2026 edition serves as a reasoned snapshot of the French market, not as a permanent certification.
