Intellectual property: Patent and trade mark attorneys in France

Cabinet Beau de Loménie

Cabinet Beau de Loménie handles the patent and trade mark portfolios of French and foreign clients, assisting them with the filing of new applications and renewals. The team is regularly requested for opposition proceedings and represents clients from a variety of sectors, and is also sought after for its litigious experience before the French and European courts and patent offices. In addition to advising industries ranging from aeronautics to life sciences, the firm has particular expertise in the fields of artificial intelligence and neural network technology. Leadership of the team is shared between Philippe Hubert, Didier Intès, François Delumeau, Pierre-Louis Desormiere, Pierre Balesta, Emmanuelle Machinet and Grégory Ingrand.

Responsables de la pratique:

Philippe Hubert;Didier Intes; François Delumeau; Pierre-Louis Desormiere; Pierre Balesta; Emmanuelle Machinet; Grégory Ingrand


Patent, trade mark and design prosecutions, transactional advice and litigation form the core of Casalonga‘s IP work, with the firm maintaining ties to firms in North America, Europe and China to advise clients on the management of their global IP portfolios. The team is split into subdivisions, advising the electronics, chemistry, cosmetics, pharmaceuticals and mechanics sectors. Caroline Casalonga is an experienced patent and trade mark lawyer, handling a broad range of litigious and non-contentious IP matters before the French courts and European Patent Office (EPO). Virginie Martin-Charbonneau is noted for her work in freedom-to-operate matters, IP licensing agreements and litigation in France and Europe.

Les références

‘Dynamic and responsive team in the management of our patent and trade mark files.’

‘Responsive and efficient team that knows our business and our strategy well and therefore responds correctly to our expectations.’

‘Caroline Casalonga is incredibly responsive and available to her clients, she is constantly looking for the best solution.’

‘Very good professional and human contact with Laurence Schardt.’

Principaux clients

Adeo (Leroy Merlin)



Baker Hughes

BBG Hyline Building Systems

Hyline Building Systems France SAS


Blue Cross Blue Shield Association


Champagne de Telmont

Crédit Mutuel Arkéa

Eram Group

Essity Hygiene and Health AB

GE Renewable Energy

GE Healthcare


Groupe France Thermes (La Compagnie de Vichy)



INAO (French National Institute of Designation of Origin)




La Chablisienne

Lalique Group

Les Laboratoires Servier France


Médecins sans Frontières (MSF) International


Moulin Rouge

Ortho Partner





Saint Gobain



SKY International AG





Viacom CBS

Principaux dossiers

  • Handled TotalEnergies’ national and PCT application drafting and filing, worldwide prosecution, oppositions and appeals at the EPO.
  • Advised L’Oreal on national and PCT application drafting and filing, worldwide prosecution, oppositions and appeals at the EPO, most notably on its packaging patents.
  • Assisted Groupe Lucien Barrière with its worldwide trade mark portfolio, including global defence and enforcement of trade marks, including filing an opposition motion in China against the trade mark application “Banniere.”

Germain & Maureau

Germain & Maureau advises across the IP spectrum, assisting global clients with patent, trade mark, design and domain name issues. The team is equipped to handle prior searches and advises on the filing and registration of patents and trade marks, while also representing clients involved in infringement, seizure and opposition proceedings. The practice group is well versed in handling such matters for companies in a broad range of industries, including the IT, telecoms, mechanics, pharmaceutical, luxury goods, and food and beverages sectors. Nicolas Delorme, Philippe Verriest, Stéphane Agasse, Lilian Henck, Alban Dumont, Maximin Salles, Bertrand Geoffray, William Lobelson and Julien Fialletout lead the team.

Responsables de la pratique:

Nicolas Delorme; Philippe Verriest; Stéphane Agasse; Lilian Henck; Alban Dumont; Maximin Salles; Bertrand Geoffray; William Lobelson; Julien Fialletout

Les références

‘A team of high technical quality, excellent advice thanks to the interaction with the client. The platform and the additional services offered are also innovative and efficient.’

‘Bertrand Geoffray has excellent interpersonal skills at the service of high-level technical skills.’

‘Knowledge of the specificity of our technical subjects.’


Lavoix‘s team offers its clients an extensive range of patent and trade mark services, including prior rights searches, filing and application strategies, prosecutions and opposition procedures, in addition to providing highly sought after representation in disputes. A popular choice among diverse clients from the luxury goods, electronics and pharmaceutical fields, the firm is able to assist in contractual issues, portfolio management and product development. The practice group’s leadership team is made up of Philippe Blot, Bertrand Domenego, Béatrice Daubin, Gérard Myon, Etienne Habasque, Olivier Rocher, Damien Colombie and Béatrice Holtz.

Responsables de la pratique:

Philippe Blot; Bertrand Domenego; Béatrice Daubin; Gérard Myon; Etienne Habasque; Olivier Rocher; Damien Colombie; Béatrice Holtz

Les références

‘Leading technical expertise, familiarity with litigation, know how to get out of their comfort zone, very creative, no nonsense.’

‘I worked with two exceptional partners: Bertrand Domenego and Olivier Rocher.’

Principaux clients













LVMH Fragrances




Parfums Christian Dior



Tarreiras Bonjean



Senoble Luxembourg

Estée Lauder

Naval Group

Principaux dossiers

  • Represented FORVIA in a dispute regarding patent infringement with supplier Benteler, ongoing since 2019.
  • Represented ArcelorMittal in an international patent appeal after opposition by Tata Steel, Salzgitter, Volkswagen, ThyssenKrupp and Muhr und Bender.
  • Advised Guerlain on the registration of a three-dimensional community trade mark for lipsticks.

Plasseraud IP

Plasseraud IP represents clients ranging from international conglomerates to start-ups and research organisations to public bodies in sectors such as mechanics, IT and life sciences. The team provides support in regard to transactional matters, including the drafting and negotiation of IP licence agreements, IP filings and registrations, in addition to opposition proceedings. The four-person leadership team consists of infringement and opposition specialist Bertrand Loisel, mechanics and electronics expert Eric Burbaud, trade marks and intangible assets lawyer Guylène Kiesel Le Cosquer and Cyra Nargolwalla, who handles opposition and appeals cases before the EPO for biotech and pharmaceutical-sector clients.

Responsables de la pratique:

Bertrand Loisel; Eric Burbaud; Guylène Kiesel Le Cosquer; Cyra Nargolwalla

Les références

‘The size of the firm and the territorial scope allows them to represent any big company, the quality services that Plasseraud provides is amazing. They cover all practice areas of IP, from domain names to patents, and payment of annuities.’

‘Guylène Kiesel Le Cosquer is the most brilliant lawyer I have ever met, her knowledge of law and the market, and leadership is a valuable and distinct asset to the representation of our clients.’

‘Guylène Kiesel Le Cosquer – an innate leader, she masters the contractual aspects allowing for excellent efficiency in negotiations. Her knowledge of trade mark law allows clients to be reassured of the outcome of disputes. Cyra Nargolwalla – one of the best technicians I have ever worked with. Her very business-oriented approach allows clients to have an excellent strategy to get what they want.’

‘Plasseraud IP offers an excellent level of service. They demonstrate in-depth knowledge of their areas of expertise and they provide solid and practical advice, with rapid response times and very competitive rates. We consider Plasseraud IP to be one of the best French firms in the IP sector. They are a top choice for our firm when instructing work in France and we would highly recommend them.’

‘Plasseraud is always at the cutting edge of innovation. It plays a pioneering role by putting forward new ways of practising intellectual property and by having in its ranks first-rate professionals on the lookout for current topics. Many times I have visited their site to find that hot topics are already being covered in a newsletter etc.’

‘Guylène Kiesel Le Cosquer shows extraordinary leadership not only within the firm Plasseraud but also in the IP industry as a whole. We benefitted from her support and impact in various aspects of work. When there is a need from her, she is always there. Highly recommended.’

‘Plasseraud is a trusted partner who gets involved in our problems, understands them perfectly and offers us pragmatic and innovative solutions.’

‘Guylène Kiesel Le Cosquer is truly an outstanding lawyer and has on several matters helped us develop strategies regarding obstacles we have faced in several jurisdictions.’

Principaux clients








Conseil national des barreaux (CNB)

Crédit Mutuel

Crime Science Technology








Facel Vega

Groupe Lpuis Roederer



Henri Selmer Paris


ImCheck Therapautics

Institut Pasteur

Les Merveilleux de Fred

Ligue de Football Professionnel





Mérieux NutriSciences


Mnemo Therapeutics

Nabilla Beauty

New Balnce



Paris Saint-Germain

Petit Bateau





Siliconix Technology


SPH – Gérard Bertrand

Tape A L’oeil

The Procter & Gamble Company



Principaux dossiers

  • Advised BioNTech on strategic IP matters, including mRNA technology for oncology.
  • Assisted Paris Saint-Germain with projects regarding NFTs and its needs in the Metaverse.
  • Advises Revcoo in the context of its intellectual property audit, carried out at the request of investors.

TAoMA Partners

TAoMA Partners supports its clients in IP portfolio management, working in France and the EU to assist with transactional and litigious matters, conducting filings, renewals, registrations and opposition proceedings to defend clients’ IP globally. Gaelle Loinger handles the economic aspects of IP issues, with a focus on the taxation of intangible assets. Malaurie Pantalacci specialises in international design protection and trade mark law, while Mélissa Cassanet advises clients on strategies for defending their trade marks, designs, copyrights and domain names. Jean-Charles Nicollet is noted for his expertise in litigation.

Responsables de la pratique:

Gaëlle Loinger; Malaurie Pantalacci; Mélissa Cassanet; Jean-Charles Nicollet

Autres avocats clés:

Blandine Lemoine-Le Boudouil

Les références

‘What makes the difference at TAoMA is the level of its team, which has a very strong entrepreneurial spirit. Each member has the same vision and values which means that from one person to another, we find the same qualities of listening and desire to provide all possible help.’

‘Regarding Malaurie Pantalacci, I am always impressed by her ability to understand her clients’ problems and to provide relevant answers, perfectly adapted to the specific case she is facing. She always demonstrates an excellent ability to listen and adapt. With her, the issues become clear and exciting.’

‘A law firm that provides complete management of a portfolio of brands. Dynamic, organised, responsive and professional team responding to external needs with a great capacity for adaptation.’

Principaux clients


ISART Digital


YETI Coolers LLC