The French Law Firm dedicated to Patent Litigation

Dhenne Avocats, your law firm dedicated to patent litigation

Dhenne Avocats: A Firm Dedicated to Patent Litigation

A patent is an industrial property right. It is useful to the creator of an invention, guaranteeing them temporary exclusive rights to exploit it in France for a period of 20 years. During this period, the patent holder can prevent anyone else from exploiting the protected invention. For the inventor, it is recognition of their inventive activity and the financial reward that comes with it.

Dhenne Avocats, a law firm dedicatedto patent litigation

Patent law is a branch of industrial property law that is becoming increasingly important. Numerous disputes are likely to arise in this area (patent infringement action, patent cancellation action, employee inventions, etc.)

In our highly competitive society, in a context of internationalisation of the economy and dematerialisation of exchanges, patents have become a priority for any inventor wishing to protect his creation. Nevertheless, because it is a living law, in constant evolution, patent law is as complex as it is exciting. This is why we put so much energy and fervour into defending each of our cases. At Dhenne Avocats, our activity is precisely focused on the protection of your inventions. We defend and advise our clients in all patent law disputes.

At Dhenne Avocats, our activity is precisely focused on the protection of your inventions.

We advise and counsel foreign and domestic businesses in all patent law disputes.

Dhenne Avocats, a law firm dedicated to patent litigation

Dhenne-lawyers-home-banner

Dhenne Avocats is a leading French law firm dedicated to patent, supplementary protection certificate (“SPC”) and know-how litigation as well as regulatory advice notably in the life sciences field.

Dhenne Avocats, your law firm dedicated to patent litigation

The firm serves leading companies whose legal needs have a strong scientific and technological component.

Dhenne Avocats is thus characterized by its focus on patent litigation, high value-added services at a fair price, responsiveness, and willingness to move forward together with its clients.

Our attorneys, who have recognized expertise, represent our clients before the French, European, and arbitration courts. They act in various technical sectors (e.g., mechanical, electronic, chemical), mainly in complex high value-added litigation (i.e., IT and life sciences).

The role of Dhenne Avocats

The role of Dhenne Avocats

Our firm's aim is to assist you at all stages of protection of your inventions.

upstream advice

The first of our missions is to map best routes of actions to protect your innovations according to your specific needs. Indeed, there are many ways to protect inventions and a patent is only one of them. In some particular cases, alternatives shall be explored, including contractual protection of know-how, trade secret protection and utility certificate.

Advance advice

In many cases, it is appropriate to adopt a "360" strategy that will appeal to both secrecy (especially NDAs) and the various domains of intellectual property (patent law, trademark law, design law, and copyright law) in order to ensure optimal protection for your innovations.

Thus, for example, the source code of a software will be protected by copyright while its functions may be protected by patents. However, it may be in some cases more judicious to opt for an action in parasitism.

Drafting your contracts

Our firm assists you in the negotiation and drafting of all your contracts related to your industrial property rights. In particular, we offer you all our expertise concerning :

Confidentiality Agreement (the «NDA«)
Patent assignment agreement
Patent license agreement
Patent Co-ownership Agreement
Technology transfer agreemen
Know-how transfer agreement
Trademark assignment agreement
Trademark licensing agreement
Design assignment agreement
Industrial Design Licence Agreement
Copyright Assignment Agreement
Computer maintenance contract
Employment Contract (particularly for confidentiality clauses or potential employee inventions)

Partnership agreement including aspects of intellectual property.

Litigation

On the side or prior to negotiations, the Intellectual Property Right can be litigated if necessary or desirable. This can be the case when an inventor’s private rights are infringed, notably in the event of patent infringement. Our role is to establish a strategy to achieve your objective on a reasonable risk base and to assist you before national Courts and/or the Unitary Patent Court ('UPC").

Mobile Court of Justice

For example, we can assist you in :

Gathering evidence
of infringement with
a seizure of counterfeit goods

Introducing an invalidation action of a third party's patent before a court Defend you against a patent infringement

Defend you against a patent infringement

Defend you against an infringement of your trade secrets, particularly in the event of a seizure of counterfeit goods

Help you fight against unfair competition, particularly in the event of parasitism

Frequently asked questions about our firm

Dhenne Avocats is a Parisian law firm founded in 2018 by Matthieu Dhenne.

The firm focuses on French patent litigation expertise in various technical sectors (mechanical, electronic, chemical), while intervening more particularly in complex high added value fields (i.e. IT and life sciences) for a varied clientele (ETI, SME, CAC 40). Dhenne Avocats is thus characterised by its activity focused on patent litigation, a high added value service at a fair price, reactivity and the will to move forward together with its clients. Matthieu Dhenne has already been distinguished by the Legal 500 (Tier 1 in the “Patent Litigation” category) and Leaders League (Strong Notoriety in the “Patents: Pharma, Biotech, and Life Sciences Litigation” category) rankings.

1. A service tailored to our clients


2. An efficient team of patent litigators

Recognised by our peers, as evidenced by our clients, which explains the firm's influence with regular media appearances.

3. A practice recognised by our peer

which explains the influence of the firm with regular interventions by the media.

Our firm was founded in 2018 by Matthieu Dhenne. A member of the Paris Bar since 2014, he is a reference in the world of patent litigation.

As such, we are regularly consulted by the French authorities during reform projects or interviewed on this subject by the media. Matthieu Dhenne also teaches in the Master 2 Industrial Property program at the University of Panthéon-Assas. He is the French referent of the international Kluwer Patent Blog, as well as the author of numerous articles and books on patent law, in particular with regard to new information technologies.

Finally, his expertise has been recognized by numerous international rankings (Legal 500 and Leaders League)

Our patent attorneys defend and advise our clients in various technical fields

We have developed contentious and non-contentious practices, particularly focusing on licence agreements, employee inventions and trade secrets.

Electronics
FRAND undertakings
Pharmaceuticals
Medical devices
Telecommunications
Chemistry
Biotechnology
Mechanics

They trust us

Matthieu has demonstrated his expertise in patent law, particularly in relation to computer-implemented inventions, through his various contributions and presentations at seminars.
Antoine Dupont

Licensing Manager at the French Alternative Energies and Atomic Energy Commission (CEA)

Matthieu has extensive expertise in patent law, which I have come to appreciate during our various collaborations.
Anne-Catherine Chiariny

Head of the Master's in Innovation program at the University of Montpellier

Matthieu, a competent professional with the desire to always get involved and the aim of bringing home the result. Truly deep knowledge of IP law.
Elena Zillio Raffin

In-house Legal Counsel at Fiorital S.p.a.

Matthieu has proven to be not only a very skilled, quick-thinking and seasoned patent lawyer, but he handled our case very aggressively (in a positive way!) and with a great deal of commitment. Highly recommended.
Michel Rorai

Head of Intellectual Property and General Counsel Marketing at Lipton Teas and Infusions

Matthieu is an accomplished and astute French patent litigator and advisor, with deep and growing experience in the French courts and the new Unified Patent Court. His expertise in patent litigation is highly recommendable.
Claire Le Floch

Head of Legal, Intellectual Property Law

Matthieu is nothing less than the "Mbappé" of French patent law! Smart, energetic, entrepreneurial and with a strong scientific background (the latter being more the white than the Mbappé). Plus a multilingual nice guy.
Prof. Dr. Tilman Müller-Stoy

German Patent Litigator, BARDEHLE PAGENBERG

Matthieu is one of the most brilliant patent litigators I have met in Europe. He possesses a very deep legal and technical understanding, coupled with a strong client-focused approach. Matthieu is inherently creative and able to devise successful legal strategies.
Guillaume Ménage

Director of Intellectual Property, Ledger

Maître DHENNE, an essential skill for the defense of our IP. Resourceful, valiant and full of energy to advise you and defend your interests. Available and attentive, which makes it a pleasant collaboration.
Stephan Auberger

Founder, SALVECO

Matthieu Dhenne has a wealth of expertise in his field. What really sets Matthieu apart is the energy he puts into defending and winning his battles!
Martin Genot

Co-President, PLEIADE VENTURE

I’ve worked with Matthieu in regards an important patent case. He has a deep knowledge about patent law and a strong engineering expertise. Highly recommended.
Alessandro ZITO

Intellectual Property Attorney, PRESSO LUXOTICCA

Matthieu is a skilled practitioner with vast experience in the IP field. I strongly recommend him for his capability, reliability and professionalism.
Nicollo FERRETI

NUNZIANTE MAGRONE IP

Matthieu is one of the leading experts in patent infringement litigation and the organization of complex and multiple seizure operations. He is always up to date with the latest case law.
Jérôme LEGRAIN

Bailiff

Mathieu Dhenne provides precise and clear advice in a field that is rarely clear: that of trademarks and patents. He knows how to be pragmatic, depending on the issues.
Ivan MASSONNAT

PAI PARTNERS, DOMAINE BELARGUS

Matthieu is clearly a highly skilled and knowledgeable expert in his field. Although we didn't work together extensively, I wouldn't hesitate for a second to entrust Matthieu with important cases.
Gabriele MOHSLER

VP Patents, ERICSSON

Matthieu Dhenne accompanies and advises the company throughout the often lengthy proceedings. We note his constant investment in the cases. The participation in the mental handling of a procedure, combined with the competence maintains the relationship of trust. Trust, a simple word, always justified.
Dominique SOARES

CEO, WAFF

If you are looking for a patent specialist who is 200% on his cases. Matthieu is perfect.
Frédéric LESCURE

CEO, SOCOMORE GROUP

I had the opportunity to work with Matthieu on a patent case with parallel procedures in Germany and France. Matthieu is primarily a highly specialised, accurate and innovative jurist.
Pierre-Aimé DESPALLE

IP Strategist | Patent Attorney (EP & DE) | UPC Representative | SEP