Company lists · Data refreshed September 2026
Top 25 Patent prosecution firms based in France
RevenueBase identified 84 patent prosecution firms headquartered in France as of September 2026 and tracks 1,455 professional contacts across them, including 541 with verified work emails. Paris is the largest hub.
This list covers patent prosecution firms headquartered in France, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest patent prosecution firms based in France
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 186 contacts → | ||||
Indirect evidence “Lavoixis a leading firm fully dedicated to IP.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 107 contacts → | ||||
Indirect evidence “CASALONGA is a leading European Intellectual Property (IP) law firm supporting and advising innovation-driven organisations across Europe and beyond.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 51 contacts → | ||||
Indirect evidence “Vidon Group is a leading Intellectual Property law firm providing services throughout the world via its own offices in Europe (France and Germany) and Asia (Shanghai, Hong-Kong…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 50 contacts → | ||||
Indirect evidence “ICOSA is an IP Law firm dedicated to Life Sciences, Chemistry and Medical Device.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 27 contacts → | ||||
Indirect evidence “Becker & Associés is an Intellectual Property Law firm founded in We bring to our clients our expertise, creativity and commitment in acquiring and defending their Industrial…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 24 contacts → | ||||
Indirect evidence “La propriété intellectuelle est notre cœur de métier, qu'il s'agisse de brevets, de savoir-faire, de marques, de modèles ou de droits d'auteur, nous proposons - De sécuriser vos…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 20 contacts → | ||||
Indirect evidence “Associés : Emmanuel Huyghe, Elsa Martin Touaux, Maryse Dulout, Claudine Kauffmann, Alexandre Delye, Grégory Riou IP TRUST réunit une équipe de professionnels formés pour…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 20 contacts → | ||||
Partial evidence “Bandpay & Greuter is an IP law firm striving to modernize services in patent matters.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 18 contacts → | ||||
Indirect evidence “We accompany a broad range of clients, including companies, individuals and institutions, operating across France and abroad.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 14 contacts → | ||||
Indirect evidence “Depuis 1970, nous conseillons des grands groupes internationaux mais aussi des PME-PMI, des inventeurs indépendants pour déposer et gérer leurs droits de Propriété Industrielle en…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 14 contacts → | ||||
Partial evidence “Renewr’s mission is to provide IP firms with the most efficient and reliable renewals of patents.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 10 contacts → | ||||
Indirect evidence “Nous assistons nos clients depuis près de 30 ans dans leur stratégie de propriété intellectuelle en intervenant à leurs côtés, en Europe et à l’international, tant aux stades de…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 9 contacts → | ||||
Indirect evidence “CABINET NETTER is a law practice company based out of 85 boulevard de Courcelles, PARIS, France.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 8 contacts → | ||||
Indirect evidence “Le Cabinet Didier Martin est spécialisé en droit des brevets et il offre l'ensemble des services requis pour traiter des questions relatives à ce domaine.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 8 contacts → | ||||
Indirect evidence “Experts reconnus en droit de la propriété intellectuelle Dans un monde en pleine mutation, il y a tant à inventer, tant à protéger.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 8 contacts → | ||||
Indirect evidence “BRINGER IP is a European Intellectual Property Law Firm, exclusively dedicated to the protection of innovative companies.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 7 contacts → | ||||
Partial evidence “Fedit-Loriot is a Patent and Trademark Firm, serving a diverse domestic and international clientele in Europe, Japan, China, Korea and the United States.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 7 contacts → | ||||
Partial evidence “MARCHAIS & Associés is a human sized law firm, entirely dedicated to the advising, prosecution and litigation in the field of intellectual and industrial property law (trademarks…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 6 contacts → | ||||
Indirect evidence “Cabinet de Conseils en Propriété Industrielle Le cabinet de Conseils en Propriété Industrielle Cassiopi, basé à Montpellier, assiste entreprises (CAC 40, PME et Start-Ups) et…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 6 contacts → | ||||
Indirect evidence “CLÉRY DEVERNAY est votre cabinet d’avocats constitué exclusivement d’experts en droit de la Propriété Intellectuelle, dont l’origine remonte à plus de 30 ans.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 5 contacts → | ||||
Indirect evidence “Nous vous représentons auprès de l’INPI, de l’OEB et de l’OMPI dans toutes vos procédures.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 5 contacts → | ||||
Indirect evidence “Le Cabinet Christophe CARON est dédié au droit de la propriété intellectuelle sous toutes ses formes (droit d’auteur, droit des marques, droit des dessins et modèles, droit des…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 5 contacts → | ||||
Partial evidence “Brandon IP is more than: 8150 brands under management 2550 patents filed 85 IP trainings carried out 85% success rate in case of litigation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 4 contacts → | ||||
Indirect evidence “LLCG Avocats is a legal services company based out of 34 BD MALESHERBES, Paris, Île-de-France.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 4 contacts → | ||||
Indirect evidence “Axe PI est un Cabinet situé à la fois sur le cluster Paris-Saclay et sur la métropole Nice Côte d’Azur.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: patent prosecution firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names patent prosecution firms.
- Partial evidence
- Its own public description names part of patent prosecution firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name patent prosecution firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 84 patent prosecution firms based in France
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Patent prosecution firms based in France at a glance
As of Sep 20, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 84 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among patent prosecution firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in France whose own description of what they do matches “patent prosecution firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names patent prosecution firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among patent prosecution firms, and records with no verified work email. Companies headquartered outside France are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 541 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Patent prosecution firms by metro
- Patent prosecution firms in Paris39
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names patent prosecution firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many patent prosecution firms are there based in France?
RevenueBase identified 84 patent prosecution firms headquartered in France as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Lavoix, headquartered in Paris, tops this list with the largest team on record.
Which city has the most patent prosecution firms?
Paris leads with 39 headquartered companies, followed by Lyon (7) and Castelnau-Le-Lez (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 541 verified decision-maker contacts tracked across these 84 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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