Plasseraud IP > Paris, France > Firm Profile

Plasseraud IP
104 rue de Richelieu
75080 Paris Cedex 02

France > Intellectual property: Patent and trade mark attorneys Tier 1

With eight offices across France and five international offices in Shanghai, Prague, Alicante, Madrid, and Munich, Plasseraud IP fields a sizeable and diverse team of attorneys, including several qualified in foreign jurisdictions, amplifying its capacity to cater to a varied client base. Leveraging this global presence, the practice serves some of the world’s largest corporations alongside regional and local organisations across industry sectors including mechanics, electronics, information sciences, life sciences, and chemistry. Co-led by Eric Burbaud, an expert in mechanics and electronics; Guylène Kiesel le Cosquer, a specialist in trademarks and intangible assets; Bertrand Loisel, a specialist in infringement and opposition; and Cyra Nargolwalla, who is experienced in handling opposition and appeals before the EPO for biotech and pharmaceutical clients, the team offers comprehensive support including drafting and negotiating IP license agreements, IP filings and registrations, and engaging in opposition proceedings.

Practice head(s):

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



Other key lawyers:

Albert Hassine; Ina Schreiber; Denis Bourgarel; Patrick Boyle; Benjamin Fontaine; Christophe Pelèse; Nathalie Pacaud; Jean-Christophe Guerrini; Sandrine Bouvier-Ravon


‘The Plasseraud IP teams are made up of specialists who are passionate about their profession; for patents this applies both scientifically and legally. They are very available to their clients and are keen to understand their needs, the company’s objectives and the challenges that their intellectual property (IP) portfolio represents for them. Plasseraud IP is always well aware of changes in laws and even anticipates them. Its participation in national and international IP congresses helps it remain at the forefront of new practices in the profession.’ 

‘Plasseraud manages all areas of IP law, and has offices all over France, Alicante, Germany and Asia. This makes it possible to work with them in different jurisdictions at the same time Their attorneys and paralegals are very responsive and efficient. They have knowledge in all areas of technology once you need patent protection in Europe.’

‘I highly recommend Guylène Kiesel Le Cosquer, the Managing Partner of Plasseraud IP. Her exceptional leadership has set an extraordinarily high standard for the quality of work and a keen focus on meeting the precise needs of her clients’ businesses. Her significant contributions to the IP industry, particularly in France, have established her as a highly respected and well-connected figure, not only domestically but also on the international stage. Collaborating with Guylène and her team provides invaluable access to exceptional resources and support.’

‘High level of expertise, particularly in new technologies. High quality of partners and collaborators.’

‘Patrick Boyle is a great litigator and advocate of bringing the UK/French relationships together. He is responsive and quick to offer solutions.’

‘Sandrine Bouvier-Ravon is highly skilled, approachable, responsive and very reliable. It is a pleasure working with her.’ 

‘We have been working with Plasseraud for years and I consider that their services provided are with the highest quality, giving complete and specific opinions. I would like to remark on the exceptional dedication and commitment that the firm has to their clients and how well prepared their members are to deal with their client’s needs. Their Trademark Practice is outstanding and always provide us with solutions and high standards. They offer accessible prices and personalized attention. Best option in France.’ 

‘Their diverse and talented team and forward-looking solutions make them a top choice for potential clients. I have full confidence that anyone seeking their services would be impressed by these strengths.’

Key clients





Mc Cain


SPH – Gérard Bertrand

Mauro Colagreco



The Procter & Gamble Company

Henri Selmer





Conseil National Des Barreaux (CNB)

Crédit Mutuel






Nabilla Beauty

New Balance

Petit Bateau

Tape A L’oeil


Les Secrets de Loly






Imcheck Therapeutics

Institut Pasteur

Mnemo Therapeutics







Mérieux Nutriscience


Crime Science Technology






Siliconix Technology


Ligue De Football Professionnel


Paris Saint Germain

Stade Toulousain


Facel Vega




Plasseraud IP is the largest French intellectual property group and one of the leading names in Intellectual Property in Europe. Plasseraud IP assists large groups, ETIs, SMEs, research institutions, start-ups and company directors through protecting, valuing and exploiting their intellectual property rights.

The group gathers more than 400 individuals, including 175 intellectual property experts in France and worldwide.

We assist our clients in defining and implementing their intellectual property strategy by drafting, filing and obtaining patents (chemistry, life sciences, mechanics, electronics, IT), trademarks, designs and models, Internet and data (domain names, GDPR), contracts and valuing intellectual property rights (portfolio audits, financial assessments, contracts). We also assist our clients in combating IP counterfeiting and infringement.

Department Name Email Telephone
Patents Bertrand Loisel +33 (0)1 40 16 70 00
Patents Eric Burbaud +33 (0)1 40 16 70 00
Patents Cyra Nargolwalla +33 (0)1 40 16 70 00
Trademarks & Designs Guylène Kiesel le Cosquer +33 (0)1 40 16 70 00
Photo Name Position Profile
Denis Bourgarel photo Mr Denis Bourgarel Partner; French Patent Attorney; European Patent Attorney
Sandrine Bouvier-Ravon photo Mrs Sandrine Bouvier-Ravon Partner at Plasseraud Avocats
Patrick Boyle photo Mr Patrick Boyle Partner; French Trademark and Design Attorney; UK Trademark and Design Attorney; European Trademark and Design…
Eric Burbaud photo Mr Eric Burbaud Partner; French Patent Attorney; European Patent Attorney; Czech Patent and Trademark Attorney
Benjamin Fontaine photo Mr Benjamin Fontaine Partner; Head of Alicante Office; French Trademark and Design Attorney; European Trademark…
Jean-Christophe Guerrini photo Mr Jean-Christophe Guerrini Partner at Plasseraud Avocats
Albert Hassine photo Mr Albert Hassine Partner; French Patent Attorney; European Patent Attorney
Guylène Kiesel Le Cosquer photo Mrs Guylène Kiesel Le Cosquer Partner; French Trademark and Design Attorney; European Trademark and Design Attorney
Bertrand Loisel photo Mr Bertrand Loisel Partner; French Patent Attorney; European Patent Attorney
Cyra Nargolwalla photo Mrs Cyra Nargolwalla Partner; French Patent Attorney; European Patent Attorney
Nathalie Pacaud photo Mrs Nathalie Pacaud Partner; French Trademark and Design Attorney; European Trademark and Design Attorney
Christophe Pelèse photo Mr Christophe Pelèse Partner; French Trademark and Design Attorney; European Trademark and Design Attorney
Philippe Picard photo Mr Philippe Picard Partner; French Trademark and Design Attorney; European Trademark and Design Attorney
Ina Schreiber photo Mrs Ina Schreiber Partner; French Patent Attorney; European Patent Attorney; German Patent Attorney
Nathalie Wajs photo Mrs Nathalie Wajs Partner; French Patent Attorney; European Patent Attorney
Number of partners : 32
Number of patent and trade mark attorneys : +175
Offices : Paris
: Shanghai
: Prague
: Madrid
: Alicante
: Munich
: Lyon
: Lille
: Toulouse
: Bordeaux
: Angoulême
: Grenoble
: Rennes
: Strasbourg

Plasseraud IP supports French and international groups, mid-cap companies, SMEs, research organisations, public institutions, local authorities, start-ups and business leaders in their innovation projects, to protect their inventions, promote their ideas and defend their rights. The Group boasts a team of 400 people spread in 5 countries: France, Spain, Czech Republic, Germany and China. 

Our office in Munich, at the core of the European Patent institutions, strengthens our activity before the EPO, while our office in Alicante is key to deepening our understanding and supporting our clients’ activity before the European Union Intellectual Property Office (EUIPO). 


Our team of IP attorneys is made up of 175 French, European but also UK, Spanish, Czech, German, US, CanadianChinese, Korean and Japanese IP attorneys. They are multilingual and multicultural: our commitment to diversity means that our services can be communicated in 15 different working languages, and with cultural sensitivity.  

Our experts are highly specialized in appearing before the European Patent Office’s Examination and Opposition Divisions and Boards of Appeal. Our unique strike force enables us to defend not only in Europe, but also in Asia. 

Our Shanghai office enables us to defend our clients IP rights in China, while our Paris-based China, Korea and Japan teams include qualified patent and trademark attorneys in each of these countries. 


Over more than 100 years of existence our firm has developed strong relationships with a wide network of highly qualified IP agents worldwide. Our international peers are recognized experts in their markets, selected by Plasseraud IP, based on their technical skills and commercial offer. We are involved in many professional organisations, where we meet our counterparts virtually or on major European and international congresses such as INTA, MARQUES, ECTA, AIPPI, AIDV, IPO etc. to promote cohesion within our network and keep our teams up to date with the last trends and the best practices on the market. 

As a result of our international exposure, we provide services to most of the world’s largest corporations and to a broad spectrum of regional and local organisations across every major industry. Over 50 % of our revenue comes from international clients. 

Diversity at the heart of our social responsibility policy!

Plasseraud IP is committed to the active promotion of diversity, which is one of the group’s five unifying values: Diversity, Human, Open minded, Committed, Excellence.

For Plasseraud IP, diversity is a source of cultural enrichment and innovation.

Present in 5 countries (France, Czech Republic, Spain, Germany and China), the group has been built up on the diversity of its experts: 15 nationalities represented, and 13 different languages spoken.

The firm is also strongly committed to gender equity. There is a fair balance between men and women, including within the Executive Committee: 2 men and 2 women who have been recognized as among the most influential women in the field of intellectual property by recognized guides of the profession. Plus, 40% of the partners are women. The balance between women and men is also reflected in our complementary expertise and offices, half of which are managed or co-managed by women;

Diversity is part of the history of the group as EGYP, a company of the group, has been managed by women exclusively for 15 years. It reaches today the perfect balance with a management made up of half men and half women.

As a member of the French Association of Diversity Managers (AFMD), one of the largest French associations for diversity managers, Plasseraud IP regularly discusses and exchanges views with the diversity actors of member organizations (companies, institutions, public organizations, local authorities, associations) on best practices in the field of diversity.

Our experts regularly put their skills at the service of charitable and social causes on a pro-bono basis. The Group also assists associations with issues related to our businesses.

Our firm also has tools for raising awareness and training its teams. Plasseraud IP’s management is particularly committed to the prevention of discrimination, respect for equal opportunities and the promotion of diversity, particularly in recruitment procedures.