Our clients create and innovate on a daily basis. We help them protect their intangible assets as effectively as possible, enabling better utilization and optimized value.
In support of its expertise in digital and innovation law, the Oyat team has long been developing its skills in intellectual property law, whether in the fields of copyright, databases, trademarks, designs, patents or know-how. Today, all economic players, whatever their sector of activity, are concerned by the need to protect their intangible assets, some of which represent a major part of their added value.
From the protection to the exploitation of these assets, the Oyat team assists its clientsto define the best protection strategy and help them optimize the value of all their intangible assets, under the best possible conditions. The team also defends them in litigation involving infringement, unfair competition or actions for revocation or invalidity.
In a world where intellectual property is now closely linked to the digital era (with, for example, the rise of blockchains and NFTs, the reuse of content on networks, etc.), our team is aware of the key issues at stake in intellectual property law, such as securing the links between creation, innovation and remuneration of authors. While intellectual property is of paramount importance in sectors such as fashion, luxury goods, events and healthcare, which the team’s lawyers know well, it is also at the heart of the media business. As such, the Oyat team has opted for a multi-sector approach, intervening in the publishing, press, audiovisual, advertising, music, radio, art, video game, entertainment and digital content industries.
Chambers 2026
“Marie-Hélène is a very reliable adviser, and the quality of her advice is highly appreciated.”
“She is an excellent lawyer who listens to the client and is highly appreciated by our team.”
“Marie-Hélène Tonnelier has always responded perfectly to our needs, with great responsiveness and availability, demonstrating an excellent ability to analyse cases.”
“She is an excellent lawyer with strong market knowledge to advise us.”
Legal 500 EMEA 2026
“A dynamic team of digital law experts who demonstrate a very high level of responsiveness.”
“Potential clients should know that OYAT excels in providing tailored solutions for businesses navigating the digital landscape. Their ability to bridge the gap between legal frameworks and technological advancements makes them a trusted partner for innovation-driven organizations.”
“OYAT’s IT and internet practice is highly regarded for its deep expertise in handling complex legal issues. The team’s ability to address matters such as IT contracts, data protection, and emerging technologies like AI ensures that clients receive cutting-edge and commercially sound advice.”
“Marie-Hélène Tonnellier stands out as France’s premier authority in TMT law, and she’s my go-to expert for all things technology, intellectual property, and data privacy. Her presence dominates top tech law conferences, her thought leadership shapes the field, and her blend of professionalism and approachability makes her truly a one-off.”
“Marie-Hélène Tonnellier and her colleague Camille Guyot are skilled at providing concise and comprehensive legal analyses and finding the right arguments to defend their clients. Furthermore, they also know how to proactively offer solutions to their clients.”
“The team stands out for its technical mastery of contractual issues related to intellectual property, liability, and cybersecurity, while remaining pragmatic and solution-oriented.”
Décideurs / Leaders League 2026
Innovation, technology & telecoms :
Best Lawyers 2027
Best Law Firms 2027
