Intellectual property: Patents in France

Allen & Overy LLP

Allen & Overy LLP remains a leading firm for multi-jurisdictional high-stakes patent litigation, especially in the life sciences and technology sectors. The practice stands out for its prolific preliminary-injunction practice, which has won multiple market first decisions, and its ability to provide seamless litigation guidance across country borders thanks to the firm's strong international patent set-up. Laëtitia Bénard, co-head of the French practice, is also co-head of the firm's global life sciences practice, underlining the importance of the sector to the practice. Pharma-sector mandates account for a significant portion of Bénard's caseload, including advisory work -on pricing regulations, advertising law, and anti-corruption matters, for example- in addition to her strong contentious practice. David Por, who co-heads the practice alongside Bénard, focuses on the high-tech and telecom sectors and brings his extensive experience in FRAND litigation to the table, exemplifying the firm's strength in matters at the intersection of patent and antitrust law. Counsel Charles Tuffreau specialises in the life sciences, engineering, energy and telecom sectors. The Paris practice also houses its own technical team and, in addition, can also call on the dedicated patent group at the firm's Legal Services Centre in Belfast - which includes patent analysts and other team members with technical and scientific backgrounds.

Practice head(s):

Laëtitia Bénard; David Por

Other key lawyers:

Charles Tuffreau

Key clients




Eli Lilly


Johnson & Johnson

Merck Sharp & Dohme


Nobel Biocare


Work highlights

  • Represented MSD in multiple actions before the Paris First Instance Court, the Paris Court of Appeals and the Supreme Court, concerning the validity and enforcement against major generic companies of an SPC.
  • Successfully represented Archos in French, German and Dutch patent infringement actions brought by Philips on both essential patents and implementation patents.
  • Represented Bayer in a multi-jurisdictional case concerning one of its major animal health products.

August Debouzy

At August Debouzy, practice heads Grégoire Desrousseaux and François Pochart lead a deep bench of patent specialists, including both lawyers and patent attorneys, which allows for a particularly broad sector scope. Clients from the medical device, chemicals, energy, telecoms and agri-food sectors rely on the team with particular frequency, both for advisory work and disputes. The group is well versed in transactional work and licensing matters, including the transfer of technology and know-how, and holds its own in cross-border litigation, with particularly strong experience in coordinating multi-jurisdictional disputes in the pharmaceutical and telecom sectors. Leveraging its full-service positioning, the practice is able to draw on colleagues from other departments for optimal case staffing, with the competition teams a key asset for matters involving FRAND issues. Counsel Lionel Martin is dual-qualified as both a lawyer and a European patent attorney.

Other key lawyers:

Lionel Martin; Mathilde Raulin


‘Traditional to convey reliability and trust, yet fast-moving and proactive.’

‘Responsive and with a high degree of relevant experience.’

‘The patent team is very responsive, combining skills in litigation and patent law. The framework of the advice provided was very well adapted with useful and measured additional contributions.’

‘The advice and considerations are straightforward and clear-cut.’

‘The team is very skilled, proactive and very responsive.’

‘Gegoire Desrousseaux and Lionel Martin provide spot-on advise whenever it is needed.’

‘The team is fully devoted to its client. They look at each file from all possible angles of attack/defence. They present a realistic view of the outcome of the case. Their knowledge of IP is second to none.’

‘Grégoire Desrousseaux, he is the ‘Pope’ of IP in France: enlightened advice, very affordable, always attentive to the needs of his client. Lionel Martin is a fine technician, each document is analysed with precision in order to make the most of it.’

‘Very focused team with deep expertise. Team works in a very pleasant atmosphere. Flexibility.’

‘A competent and powerful team, with high technical and legal skill and always responsive and clear.’

‘One of the many strengths of the team is the experience and the broad professional expertise of the collaborators, both (i) technical/scientific specific with regard to the industrial sectors concerned, (ii) qualification in patent matters and (iii) purely legal expertise, particularly in matters of litigation. This broad expertise is a guarantee of (i) quality understanding of the issues for its clients and (ii) the success of the deals handled.’

‘In general, the people from August & Debouzy with whom we are in contact are characterised by their listening skills, and therefore by their very great understanding of the issues for their clients.’

‘Fluid communication.’

‘The strength of the AD team is probably its ability to inform us about the IP strategy to adopt based on the existing state of the art. This advice is based on their experience.’

‘The flexibility of the team stands out, they are always ready to take into account our requests and our perspectives, to think about the most appropriate strategy. Also, their ability to adapt their thinking according to the elements that we bring to them, and to propose the most adapted solutions according to the needs of the company.’

‘The team is unique because it is made up of ‘classic’ lawyers, lawyers who are also European representatives. This team therefore understands perfectly and very quickly the very technical aspects of the files, which is a real plus. In addition, the team can mobilise other expertise within the firm: tax, competition law, administrative law, commercial law…’

‘Grégoire Desrousseaux, François Pochart, Abdelaziz Khatab, Lionel Martin. What sets these lawyers apart: expertise, capacity for work, responsiveness, client orientation and creativity.’

‘Competent multidisciplinary team capable of synergy.’

‘Grégoire Desrousseaux is an exceptional lawyer, remarkable for his diverse and complementary skills and for his network allowing to deepen the subjects.’

‘An experienced, responsive and pragmatic team.’

‘Grégoire Desrousseaux is a very experienced partner in patent litigation. His rigour, his reactivity, his pragmatism and his ability to quickly understand the client’s universe are real assets.’

Key clients



Epsilon Composite


Gaz Transport et Technigaz (GTT)


Saint Gobain Abrasifs

Dassault Aviation

Dassault Systemes




Fresenius Kabi Deutschland

Total marketing Services


Nutricia / Danone


B Braun







Work highlights

  • Represented Huawei, as defendant, in seven infringement actions against Intellectual Ventures involving Standard Essential Patents (SEP) and FRAND (Fair Reasonable and Non Discriminatory) licensing issues, nullity counter claims, and with trade secret issues and parallel litigation in Germany.
  • Represented l’Oréal and its supplier Fapagau against Envases and its exclusive distributor Scanavo in a patent infringement action in which trade secret issues were raised in relation to the seizure of documents at our client’s premises.
  • Assisting Teva in a complex case against Novartis which is asserting two patents against a Teva generic anticancer therapy product, with parallel litigations in the Netherlands and before the EPO.

Bird & Bird

Bird & Bird is an excellent address for clients seeking experts in complex patent matters, both for contentious and non-contentious work. With the office's specialisms in the life sciences and healthcare, technology, communications and media, and entertainment and sports sectors, the practice is aligned with the firm's wider international platform and able to draw on its longstanding track record of coordinating high-stakes cross-border disputes. Less visible in the market, but no less powerful is the group's advisory practice which includes licensing agreements as a core line of work. Practice heads Yves Bizollon and Anne-Charlotte Le Bihan direct the team, one of the largest in the Paris market, which includes counsel Laurent Labatte, a dual-qualified patent attorney and lawyer.

Other key lawyers:

Laurent Labatte


‘Anne-Charlotte Le Bihan is an excellent lawyer in the field of patent litigation, but also in all that is ‘regulatory’. Géraldine Arbant is very talented in the transactional field.’

Key clients



Life scientific

Accord Healthcare


Alstom Transport

Edwards Lifesciences





Work highlights

  • Represented Amgen, the first player to have launched a biosimilar of  worldwide blockbuster Humira® in Europe, in infringement litigation against claimant Fresenius.
  • Represented Edwards Lifesciences in a patent infringement procedure against Meril.
  • Represent Allergan and Allergan France against Mylan in an important patent matter.

Gide Loyrette Nouel A.A.R.P.I.

Gide Loyrette Nouel A.A.R.P.I. stands out for its versatile partner bench and its focus on the medical device, pharmaceutical and telecommunications sectors. The practice demonstrates particular strength in contentious work, as reflected in the track records of practice heads Grégoire Triet, Jean-Hyacinthe de Mitry, Arnaud Michel, Emmanuel Larere and Raphaëlle Dequiré-Portier; the latter four, however, also manage a substantial transactional caseload. Overall, mandates include both domestic and cross-border cases, with a particularly strong focus on multi-jurisdictional matters involving other European states. Internally, the firm's commitment to forming versatile lawyers is reflected in the training of its associates, all of whom work on the gamut of intellectual property matters, involving both soft and hard IP.


‘Consulting and litigation vision, ability to intervene in many jurisdictions, very good understanding of the client ‘s objectives and ability to adapt; great responsiveness.’

‘A very strong competent team of lawyers, with strong legal and technical expertise.’

‘Emanuel Larere and Raphaëlle Dequiré-Portier are both very well informed, creative and helpful.’

Key clients

Beckman Coulter


ONO Pharmaceuticals

Johnson & Johnson

Pernod Ricard

Bristol Myers-Squibb



Wsou Investments

Jacobs Douwe Egberts group

Sanofi-Aventis Deutschland



Maury Imprimeur

Work highlights

  • Defending biomedical-testing process specialists, Beckman Coulter, in a patent infringement action brought by German company BRAHMS, regarding the composition of a calibrator for a sepsis detection test.
  • Assisting Wsou Investments, a US non-practicing entity in the telecom sector which acquired an important patent portfolio from Nokia, in two patent litigations against Huawei.
  • Advising Pernod Ricard on all patent issues related to the development of a joint-venture with Coca-Cola and Heineken to invest in a cocktail maker machine.


HOYNG ROKH MONÉGIER sets itself apart from its competitors through its powerful European platform and corresponding experience in cross-border disputes. The IP boutique impresses with its nine-partner bench and its wide-ranging specialist offering, with the telecoms and life-science sectors (where the practice also offers specialised patent attorneys), along with the automotive, electronics, food, pharmaceutical and cosmetics industries all core sectors. Thanks to its European set-up, the group can draw on its teams in other jurisdictions where needed, for example on its Dutch prosecution experts. Sabine Agé, Denis Monégier du Sorbier and Benoît Strowel form the lead trio of the practice. Amandine Métier is particularly well known for her strength in telecoms and life sciences disputes. Former counsels Caroline Levesque (mechanics, aeronautics and biotechnology patents) in Lyon; and Marta Mendes (patent and trade secret litigation, including employee invention matters), were raised to the partnership in January 2020 and 2021, respectively.

Other key lawyers:

Amandine Métier; Sophie Micallef; Florence Jacquand; Marta Mendes

Key clients


Bouygues Telecom

Ceva Santé Animale

Conversant Wireless




Heckler & Koch






Procter & Gamble







Volvo Trucks


Zimmer Biomet

Work highlights

  • Assisting Lenovo entities in litigation against IPCom regarding patents declared essential to various telecommunications standards, involving parallel proceedings in the UK and the US.
  • Acted for Philips in a dispute against TCL Mobile (TCT) regarding a portfolio of patents declared essential to various telecommunications standards, involving parallel proceedings in the UK.
  • Assisted Conversant Wireless Licensing in asserting a large essential patent portfolio related to mobile telecommunications against LG Electronics, involving parallel proceedings in the UK and Germany.

Jones Day

At Jones Day, practice heads Emmanuel Baud and Thomas Bouvet lead a distinctly international practice. With their extensive experience in multi-jurisdictional matters, Baud and Bouvet and their team are very much in step with the firm's wider international set-up, making the France team a valuable guide and advisor in cross-border disputes not only in Europe, but also in the Americas and Asia. The practice demonstrates particular strength in the life sciences sector, including experience in plant variety rights, but is active across a broad range of industry sectors, with technology and medical devices both stand-out areas of work.

Practice head(s):

Emmanuel Baud; Thomas Bouvet

Key clients


Vestergaard Frandsen


Department of Agriculture of Western Australia (WAAA)


Work highlights

  • Represented Infineon, as defendant, in an action brought by Intellectual Ventures for patent infringement based on a Standard Essential Patent (SEP) regarding ADSL technology.
  • Represented Santen before the CJEU in a dispute over pharmaceutical patent term extensions (supplementary protection certificates).
  • Represented a global pharmaceutical company in a patent infringement action brought against several companies in relation to its patent and SPC covering a drug used to lower cholesterol.


Linklaters' impressive profile is built upon its combined strength in patent litigation and transactional and licensing work. Practice head Pauline Debré and her team are known for their cross-border skills and ability to leverage the firm's international network for multi-jurisdictional disputes, but are also well versed in high-profile domestic litigation. As part of a full-service firm, the team is well equipped for the growing consideration of antitrust issues in patent litigation, since the office's competition experts can be called on as required. The transactional practice includes M&A matters as well as capital market-related work, restructurings and licensing agreements, for example in the context of research and development partnerships. Pharmaceutical clients call on the team's expertise with frequency, but the client roster also includes a substantial number of companies from the consumer and luxury goods, technology and automotive sectors. Counsel Gaëlle Bourout, a life sciences and pharmaceutical expert, French and European patent attorney and former EPO examiner, joined the practice from Plasseraud IP in January 2020.

Practice head(s):

Pauline Debré

Other key lawyers:

Gaëlle Bourout


‘Pauline Debré’s team is exceptional, because Pauline is an exceptional leader. I have rarely seen a partner be so respectful of his collaborators and this is the difference that makes a united, responsive team with a level of competence. exceptional expertise.’

‘Pauline Debré: exceptional woman, calm, listeNS, expert in her field. Jean-François Merdrignac: very available, follows his files very well, very good negotiator.’

‘Pauline Debre of Linklaters Paris is very knowledgeable about the law and business and is also very personable. She kept on top of things and kept moving things forward. This is an excellent team about which I have only very high praise and no complaints.’

Key clients

Merck & Co / Merck Sharp & Dohme

Intel Corporation

Silgan Holdings

Peninsula Capital

Nestlé Health Sciences

Seoul Semi-Conductor

Work highlights

  • Advised and represented Merck Sharp & Dohme in a patent revocation action launched by Ethypharm against the French designation of a European patent owned by MSD.
  • Advised Nestlé Health Science on the drafting and negotiation of licence and supply agreements for the development of a dietary supplement for diabetes and pre-diabetes patients with Valbiotis.
  • Advising and representing Intel-affiliate Lantiq, as a defendant, in an infringement action brought by Intellectual Ventures II against internet provider Orange, and concerning a patent essential to the ADSL standards,


Aramis has seen an uptick in work from the life sciences, biotechnology and cosmetics sectors, with instructions frequently including a cross-border element. The team's busy international caseload attests to the reliability of its network of partner firms in foreign jurisdictions and its experience in assisting foreign firms with their French patent matters. Benjamin May directs the team which includes Louis Jestaz who made counsel in 2020. Together with their associates, the pair cover a wide range of industries, including the food and beverage, construction, pharmaceutical and fashion sectors. In addition to the litigation practice, the group also undertakes advisory work, both in a transactional context and in relation to licensing agreements.

Practice head(s):

Benjamin May

Other key lawyers:

Louis Jestaz

Key clients



Arcadophta et BVI France / Ophtafrance et Alchimia

Amphenol Socapex / Université de Toulouse



Sedis Logistics




Work highlights

  • Represented Arcadophta & BVI France in an infringement action against Italian company AL.CHI.MIA and French company OPHTA France regarding the French part of a European patent which covers a medical device and process in the field of ophthalmic surgery.
  • Acted for defendant Allegan Industries, Allergan Holdings France and Allergan USA in a patent and know-how related legal action before Paris Courts, involving complex anti-suit injunction issues.
  • Advised Belmoca in a pan-European patent litigation against Douwe Egberts.

Armengaud Guerlain

Boutique firm Armengaud Guerlain is an excellent choice for clients seeking well-rounded advice from experienced partners, both for domestic and cross-border matters. Lead duo Catherine Mateu and Stéphane Guerlain are seasoned litigators and negotiators with experience in hard and soft IP and a proven track record assisting a wide range of clients, including listed companies, small and medium-sized enterprises and individuals. The team's versatility is reflected in a varied caseload that includes high-profile matters from a number of sectors, including the technology, pharmaceutical, oil and gas, and agriculture sectors. Firmly rooted in Paris, the practice proves time and again its ability to mobilise its international partner network to ensure its clients receive a smooth service across country borders.

Other key lawyers:

Guillaume Klasen; Marguerite Higgons

Key clients

Merck Millipore

Estar – Medical

Castorama – Kingfisher

IMV Technologies





Telecom Design

Work highlights

  • Defended Wiko in smart phone-related patent infringement actions initiated by Philips alleging the infringement of three patents in France, three in Holland and 16 in Germany.
  • Represented Telecom Design in litigation regarding an employee’s invention and corporate restructuring, following the acquisition of the goodwill of a divested company.
  • Defended the clients in a patent infringement action, twice obtaining a stay on the patent infringement proceedings (concerning bioreactors), and successfully obtaining payment of our client’s legal fees by the opponent.

DTMV & Associés

Independent firm DTMV & Associés acts in contentious and non-contentious matters, and has built a particularly good reputation for its litigation expertise. The group assists a varied client list that includes major French and international companies, as well as small and medium-sized enterprises, particularly from the pharmaceutical, automotive, telecoms and mechanical equipment sectors. In October 2019, digital entertainment specialist Julien Grosslerner joined the team from his own firm, Grosslerner Avocats, bringing the firm's partner count to five, with founding partner Thierry Mollet-Viéville, Thomas Cuche and Pascal Lefort as the key patent contacts, and Eléonore Gaspar and Laurine Janin-Reynaud the main names to note for trade mark and copyright matters.


Excellent work product, always available and with innovative ideas.

All potential legal options are checked and proposed if promising. Active and forward-looking approach.

Hogan Lovells (Paris) LLP

Hogan Lovells (Paris) LLP focuses on cross-border litigation for major international companies, predominantly from the automotive, life-science, energy, chemicals and electronics industries - all areas the firm counts among its core areas of activity. The practice is particularly busy with pharmaceutical clients for which it has secured a string of innovative decisions. Paris practice head Stanislas Roux-Vaillard frequently joins forces with his colleagues abroad, especially with the teams in Germany, the UK and Italy. His experience in arbitration and mediation complements his court litigation capabilities. In addition to the busy contentious caseload, the practice is also involved as IP counsel in transactions, including major transactions in the technology sector where the team assists its corporate colleagues.

Practice head(s):

Stanislas Roux-Vaillard

Key clients

Eli Lilly

Icos Corporation

Work highlights

  • CHECKING CONFIDENTIALITY Represented Eli Lilly in the French portion of generic attacks on its oncology product, Alimta, with parallel proceedings in the UK involving not only UK, but also French, Italian and Spanish patents.
  • Represented Icos Corporation in two distinct litigations in France -before the First Instance Court of Paris and the Court of Appeal of Paris, respectively- in relation to a validity and infringement action related to Lilly’s urology dose patent for its product Cialis®.
  • Represented Nikon in its patent dispute (i Europe) with ASML and Zeiss in relation to their immersion lithography machine, involving 28 proceedings across the Netherlands, Germany and France.

Pinsent Masons LLP

With extensive experience in cross-border work, Pinsent Masons LLP has a strong engagement in the energy, life sciences, electronics, telecoms, retail and transport sectors. Practice head Emmanuel Gougé and his team are particularly active in litigation, but also handle a busy advisory caseload - primarily as counsel on technology transfers. With in-depth knowledge of the life sciences and pharmaceutical sectors, legal director Jules Fabre has impressed with his leadership on  a number of high-profile matters.

Practice head(s):

Emmanuel Gougé

Other key lawyers:

Virginia de Freitas; Jules Fabre


‘Legal director Jules Fabre is one of the top experts in the patent litigation field.’

‘Pinsent clearly has strong IP expertise, has been able to meet the needs of a mid-sized business, but has an international reach.’

‘Emmanuel Gougé has shown his ability to manage a fairly complex litigation. Virginia De Freitas has shown great involvement in the matter. Both with a great mastery of IP law and a great in-depth work.’

‘Jules Fabre is highly recommendable.’

‘From my experience of working alongside them, I can testify that they are truly market-leading ’

‘Having worked in-house for a number of years, Jules Fabre knows the industry and uses that knowledge and experience to help us navigate the market and deliver a competitive edge, in the context of both French and pan-EU work. He is diligent, proactive and personable.’

Key clients


Accord Healthcare

Teva Pharmaceuticals


France Brevets

Work highlights

Cabinet Schertenleib

Cabinet Schertenleib enjoys an outstanding reputation for its technology and life sciences litigation prowess. The team distinguishes itself from other practices through the dual-qualifications of name partner Denis Schertenleib and Ombeline Degrèze-Péchade who bring their respective expertise in physics and molecular biology, and medicine to the table. Additionally, Schertenleib is also a qualified solicitor in England and Wales, making the practice a good choice for matters requiring cross-border expertise. Its track record of assisting with high-profile disputes, including litigation regarding FRAND issues and supplementary protection certificates, attest to the group's excellence.

Other key lawyers:

Denis Schertenleib; Ombeline Degreze-Pechade; Estelle Vard; Alexis Augustin

Key clients









Work highlights

  • Represented Mylan in its revocation action against the SPC held by Gilead on Truvada.
  • Acted for Sandoz in litigation regading Darunavir’s SPC.
  • Act for Amgen in its infringement case against Sanofi relating to Praluent.

Simmons & Simmons

Simmons & Simmons scores highly with its excellent track record in the pharmaceutical and life sciences sectors, as well as with its strength in multi-jurisdictional matters. Able to assist with high-stakes litigation and with transactional and licensing matters alike, the Paris-based team attracts a broad range of clients, including French and international companies from the retail, telecommunications and medical-device sectors. Marina Cousté and François Jonquères (who holds a Ph.D. in pharmacology), are the key contacts for the patent practice; Sarah Bailey, in turn, is the main 'soft IP' practitioner while also contributing her licensing experience on patent matters. Thanks to the firm's full-service offering, clients can also rely on the firm's experts in other practice areas as required - notably antitrust, corporate and tax.


‘Simmons & Simmons is a team with perfect knowledge of the health sector and has all the specific skills to support its clients. It is a team with which it is a pleasure to work: availability, reactivity and being a force for anticipation and innovation.’

‘Mickael Da Costa is a precious support due to his very good quality of listening and synthesis, as well as his commitment to the files. François Jonquères’ expertise in patent matters makes it possible to make a difference in complex cases. As for Anne-Catherine Perroy, her expertise allows her to offer innovative analyses and solutions to the issues raised.’

‘A firm with a very efficient team, attentive and capable of assembling complex files. The team of lawyers is among the best in Europe.’

‘Maitre Cousté and Maitre Jonquères are both exceptional.’

Key clients

Bell Helicopter Textron

Thales Digital Identity & Security

H. Lundbeck

JC Bamford Excavators

Mitsubishi Electric Corporation


Neo Medical


Bayer Healthcare


Work highlights

  • Represented JC Bamford Excavators in multiple patent actions against one of its main competitors before the Paris Judicial Court, the Court of Appeal of Paris and the Supreme Court, and concerning the validity and enforcement of three of its patents (related to excavators).
  • Represented Merck in a patent validity action initiated by a group of patients using Levothyrox.
  • Assisted Genethon with the negotiation and drafting of a clinical research collaboration and licence agreement with its US partner, Sarepta Therapeutics.

Abello IP Firm

Abello IP Firm specialises in patent litigation regarding telecom and mechanics patents (its traditional areas of strength), but continues to build its reputation in disputes involving life sciences and pharmaceutical clients. Employee invention matters and infringement seizures are other areas of expertise strength. The team consists of lawyers and patent engineers and is active in domestic and multi-jurisdictional matters, often involving parallel proceedings in other European countries. Michel Abello directs the practice in conjunction with Marie Liens and Guillaume Dubos, who were both promoted to the partnership in January 2020.


‘Mickael Jeuland and Guillaume Dubos listen to requests and are pragmatic. Good responsiveness.’

‘A very efficient team, led with tact and brilliance by Michel Abello who knows how to get the best out of all his colleagues’

‘Michel Abello is a brilliant mind who combines sharp legal knowledge with a sharp scientific mind which also allows him to understand the technical subjects with which he has to deal. He also allows members of his team to express their talents and gain strength. I would quote in particular Guillaume Dubos, who seems to me to be a rising star.’

‘Michel Abello and Guillaume Dubos have consistently impressed with their responsiveness, the thoroughness of their analysis and the ease of dealing with them. They give clear advice, are not afraid to come ‘off the fence’ and are really committed to giving the client the best possible service. Over the years their technical expertise in pharmaceutical matters has grown hugely and they are now really strong in this area and seem very comfortable with the technology.’

‘I would describe the practice as reactive, competent and personal.’

‘I would describe the individuals I work with, in particular Michel Abello, Jean-Baptiste Thibaud, Delphine Rudloff, Marie Liens and Guillaume Dubos as very passionate, competent and efficient ’

Key clients



Manitou BF

GTT (Gaz Transport Technigaz)




Bucher Vaslin


ViiV Healthcare UK/GSK (in collaboration with Simmons & Simmons)

Work highlights

  • Represented SFR, as defendant, against multiple SEP litigation claims brought by Intellectual Ventures.
  • Represented Manitou n multiple patent infringement procedures brought by JC Bamford, including supervision of  parallel British and Italian procedures.
  • Represented ViiV Healthcare UK in an SPC nullity suit and infringement counterclaim brought by Biogaran.


With core areas of expertise in the pharmaceutical, medical device, biotechnology, chemicals, mechanical and electronics sectors, the team at Altana offers strength in both litigation and transactional matters. This breadth ensures a varied caseload and attracts established French and international companies, as well as start-ups. Practice heads Armand Aviges, Pierre Lubet and Jean-Guy de Ruffray assist with a wide range of matters, including infringement and invalidity proceedings as well as preliminary injunctions, and are all experienced in cross-border matters. The group's transactional practice also handles research and development agreements, audits and technology transfers. Frank Valentin joined DLA Piper in February 2021.

Other key lawyers:

Cédric Meiller


‘Efficient team, attentive to our concerns and available.’

‘We usually work with Cédric Meiller and we appreciate his common sense, quality and fine reasoning.’

Bardehle Pagenberg

The Paris practice of IP boutique Bardehle Pagenberg unites lawyers and patent attorneys under one roof, allowing clients to receive prosecution and litigation services from a single firm. As a key hub of the firm's international presence, the Paris office specialises in multi-jurisdictional disputes, especially from the telecommunications, electronics and consumer goods sectors. Practice head Julien Fréneaux is a seasoned litigator who also offers longstanding experience in licensing agreements, technology transfers and other patent licensing contracts.

Practice head(s):

Julien Fréneaux

Other key lawyers:

Dominique Dupuis-Latour; Marie-Claude Pellegrini


‘Julien Fréneaux’s team combines legal and technical skills.’

‘Julien Fréneaux is an excellent patent expert, very precise and ingenious.’

‘Strong competence in French IP and process law, very efficient way to deal with the case with a dedicated team, high level strategic approach, seeking for all possible claims or defenses, excellent communication (also in English) and collaboration skills.’

‘High level of experience in court proceedings.’

‘The partner we work with is Julian Fréneaux. He is very responsive, reliable, skilled and experienced.’

Key clients

Free / Free Mobile / Iliad


Intellectual Ventures


Work highlights

  • Represented and assisted Intellectual Ventures in a series of high-profile patent infringement disputes against three French telecommunications services providers, also involving several of their respective equipment suppliers.
  • Successfully assisted the German patent holder in the first-ever ‘anti-antisuit injunction’ case in France.
  • Successfully assisted French telecommunications networks operator Free Mobie in a software-related case before the French courts and the Court of Justice of the European Union (CJEU).

Bignon Lebray

Bignon Lebray bolstered its IP bench in January 2020 with the arrival of Barbara Bertholet and her team who joined the firm from Adaltys Avocats. With Bertholet's dual expertise in patents and healthcare law, the practice is a natural fit for clients from the healthcare and life sciences sectors, including biotechnology players, e-health providers and medical device manufactures. The caseload includes infringement and validity disputes as well licensing matters, often involving high-stakes and foreign jurisdictions. Research and development agreements, employee invention agreements and technology and know-how transfer agreements are all areas in which the team has expertise. Nicolas Moreau is the head of the intellectual property and information technology group.

Practice head(s):

Nicolas Moreau

Other key lawyers:

Barbara Bertholet


Bignon Lebray shows availability and great listening skills.

They always listen, are able to deliver quick solutions that take context into consideration – everybody involved in the negotiation recognised the value that the firm brought to the table.

Key clients

NG Biotech


Ermete Giudici

Work highlights

  • Represented Sandoz in a patent litigation against the pharmaceutical company Daiichi Sankyo regarding an SPC infringement claim.


Casalonga impresses with an exceptionally broad sector-offering that encompasses experience in high-stakes litigation, prosecution matters and advisory work on licensing agreements. The team consists of a deep and experienced bench of lawyers and patent attorneys facilitating a 360-degree vision of any type of patent matter. The life sciences, mechanics, and, increasingly, the information and communication technology and electronics sectors account for the majority of instructions, with matters including FRAND-related issues. Caroline Casalonga is the firm's managing partner.

Practice head(s):

Caroline Casalonga

Other key lawyers:

Marianne Gabriel; Arnaud Casalonga; Floriane Codevelle

Key clients


Ortho Partner

BBG Hyline Building Systems













Work highlights

  • Represented Biogaran in litigation against Gilead in the field of pharmaceutical patents and SPCs, in particular concerning the interpretation of Article 3 of Regulation (EC) No 469/2009.
  • Represented Ortho Partner in a patent infringement and nullity matter on brackets.
  • Assisted the client with national and PCT application drafting and filing, along with wordwide prosecution, as well as representations in oppositions and appeals proceedings at the EPO.

De Gaulle Fleurance & Associés

De Gaulle Fleurance & Associés sets itself apart through its "project approach" to staffing patent matters, choosing the necessary experts individually for each new case. The practice assists with transactions, portfolio management and disputes, handling matters for a broad range of industries including the technology, software, medical device and automotive sectors. Licensing agreements, particularly in the context of research and development agreements, are another key area of strength. Louis de Gaulle, Francine Le Péchon-Joubert, Julien Horn and Serge Lederman make up the quartet of co-practice heads.

Key clients



Dassault group



OPPO Mobile





Spot Me

Ile de France Mobilité


French Tennis Federation

My retail box

Bergerat Monnoyer



Château de Versailles



DreamWorks Animation/NBC Universal


GIP Paris 2024 (Organization Committee of the Paris 2024 Olympic Games)


Hill’s Pet Nutrition


Les Amis de Delâge


National Football League


Palais des Thés



Yann Couvreur Pâtisserie



247 Films

Bibliothèque Nationale de France



CNC (Centre national du cinéma et de l’image animée)


Dassault Systems

Editions Xavier Barral

Epic Games



No Money Productions


Ubi Bene

Yale University Press

Work highlights

  • Advised and represented specialist autonomous-vehicle-technology company, EasyMile,  in litigation brought by Kompai Robotics regarding alleged software infringement and unfair competition.

Dechert LLP

At Dechert LLP, practice head Marie Fillon and her team focus on the life sciences sector where they assist with litigation and non-contentious matters, including the IP aspects of transactions and licensing agreements. With clients including pharmaceutical, cosmetics, biotechnology and medical device companies, as well as private equity investors, the practice provides a comprehensive offering on patent licensing, supported by Fillon's experience in patent disputes. In line with the firm's positioning, the group is also an excellent choice for start-ups, especially French med-tech and biotech players, seeking assistance with their agreements with big companies, academic institutions or public research centres. Cross-border matters are also part of the practice's DNA thanks to the firm's longstanding international positioning.

Practice head(s):

Marie Fillon


‘Marie Fillon – excellent for transactional life sciences; making a name for herself in patent litigation as well; she is one to watch!’

Key clients

ArchiMed – Polyplus Transfection

Astorg Partners – HRA Pharma / Mederma

Work highlights

  • Advised healthcare-industry investment specialists, ArchiMed, on key intellectual property-related agreements in connection with the partial sale of Polyplus-Transfection and with its reinvestment -alongside Warburg Pincus- in the Polyplus group.
  • Advised the private equity fund Astorg Partners (and its subsidiary Laboratoire HRA Pharma), on key patents license-agreements in connection with HRA’s acquisition of all assets related to the Mederma brand from Merz Pharma.

Herbert Smith Freehills LLP

Herbert Smith Freehills LLP demonstrates particular strength in the pharmaceutical and TMT sectors, both core areas of expertise for patent litigation head Frédéric Chevallier - who also co-leads the firm's European pharmaceutical practice. The group has noteworthy experience in multi-jurisdictional high-stakes litigation and can join forces with its colleagues in other European offices -including its powerful UK team- to fully staff pan-European disputes. The group's track record of advising on supplementary protection certificate and FRAND-related disputes attests its ability to take on the market's most significant topics in a litigation context. The patent practice is an integral part of the broader IP and TMT practice, led by the renowned Alexandra Neri.

Key clients



Cavatorta France

Work highlights

  • Acting for Cavatorta France in a pending patent infringement action seeking injunction measures and damages for alleged patent infringement.


European IP boutique Taliens offers specialists in cross-border litigation and transactional work, including due diligence. Since its foundation in 2017, the firm has established itself as a renowned address for patent disputes in the Paris market, not least since it can also call on offices in Munich and Madrid and also attends a great diversity of clients, from telecoms, aerospace and AI to veterinary products, construction and steel. Jean-Frédéric Gaultier heads the practice, which works in conjunction with a specialised French firm for its clients' prosecution requirements.

Practice head(s):

Jean-Frédéric Gaultier

Key clients




Marin’s International






Work highlights

  • Represented the client in a patent infringement action initiated by Intellectual Ventures against three of the four French network carriers and their suppliers, including ZTE, Nokia, Sagemcom, Huawei.
  • Advised Facebook AI Research’s Paris laboratory on developing collaboration deals and R&D projects with French and foreign research institutions and universities in areas such as deep learning, computer vision, audio and speech processing, natural language processing and machine learning.
  • Advised Marin’s International on several patent litigation and pre-litigation proceedings.


At CMS, counsel and patent practice head Jean-Baptiste Thiénot continues to increase the practice's market share. Founded in 2018, the group specialises in litigation concerning the life-sciences sector, an area of particular strength thanks to Thiénots additional experience not only in life sciences regulatory matters, but also the mechanics and electronics sectors. The litigation caseload forms the core pillar of the practice, but the team is also active in technology transactions and tax matters requiring patent expertise - such as disputes regarding research and development expenses, for example. The firm's international office network allows for seamless cross-border coverage. Anne-Laure Villedieu is the head of the overall technology and IP practice.

Practice head(s):

Jean-Baptiste Thiénot


‘CMS has an excellent IP patents team. Jean-Baptiste Thiénot and Sabine Rigaud -in particular- form a very high level counsel duo, with a lot of experience and particularly rare dynamism.’

‘Jean-Baptiste Thiénot and Sabine Rigaud are both highly recommended from this team. Both benefit from great experience, easy interpersonal skills and a remarkable liveliness of mind. It is particularly pleasant to work with them.’

‘Unparalleled availability Clear explanations for non-legal professionals. Connecting with the right people on related subjects.’

‘A special mention to Maitre Jean Baptiste Thiénot who was our main point of contact and who often amazed me by his availability, his ideas and his success on our files. Well done!’

Key clients

J Well



Johnson & Johnson

Work highlights

  • Representing the client in patent infringement proceedings launched against its main competitor; currently implementing the second part of our strategy which includes three parallel proceedings: (i) an appeal before the Pairs Court of Appeal, (ii) the damage calculation proceedings and (iii) seeking an indemnity against the seller of the concerned patents after a successful representation in first instance court.
  • Ongoing advice to Vinci on the development of an affiliate (Léonard) whose mission is to foster innovation within the Vinci group of companies, particularly through incubation of employee’s inventions as well as via external start-up companies.

Reed Smith

Reed Smith ramped up its IP practice in July 2019 with the arrival of Marianne Schaffner and her team from Dentons. Patent, trade secret and trade mark specialist Schaffner now heads both the French IP practice and the firm's European patent practice. The former, in particular, is known for its litigation strength, with the healthcare, chemistry technology and telecom sectors as core areas of engagement.

Practice head(s):

Marianne Schaffner

Other key lawyers:

Thierry Lautier


High level of competence and reactivity. Very involved in the client’s stakes.

Marianne Schaffner leads a strong group with good insight into pan-European campaigns.  The Reed Smith team is responsive and understands patent litigation well within France and elsewhere in Europe.

Excellent team collaboration.

Thierry Lautier: engineer and lawyer. He is a considerable and rare asset for any technology company seeking to develop, monetise and defend a patent portfolio.

Thanks to his double background in engineering and law, Thierry Lautier is remarkable in patent and trade secret work.

Marianne Schaffner will think outside of the box for the best solutions for the client, helping to shape the litigation to the business needs of the client.

They are very open to suggestions and take a 360 degree approach.

Marianne Schaffner: very competent, real business partner, very good negotiator.

Key clients


Pierre Fabre





Tate & Lyle

Johnson & Johnson