Jeantet‘s focus areas encompass cross-border patent enforcement and validity disputes with particular proficiency in the biotech, life sciences and mechanics sectors. The team provides advice on innovation protection, including litigation to licensing and audits. The team is co-led by Benjamin May, an expert in multi-jurisdictional infringement actions who joined from Aramis in January 2025 and Frédéric Sardain, a specialist in technology transactions and data compliance. Tristan Cassagne is another name to note.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- ‘Benjamin May is an experienced patent litigator, business minded and very responsive. While his focus in patent disputes is life sciences, his comprehensive experience in IT-/Data law enables him well to take on work in other technical fields / industries. ’
- ‘The Jeantet team is serious, has excellent interpersonal skills, good communication with intermediaries on its cases and a clear strategy.’
- ‘Benjamin May is very involved in his cases, has in-depth knowledge in his field, and seeks to get the best out of the service providers he works with.’
Key clients
- Fresenius Medical Care
- Belmoca and AluSense
- Preformed Line Products
- Zentiva France
- DSM-Firmenich
- Out & Out Chemistry
- Ligier
Work highlights
Assisting Fresenius Medical Care in a pan-European litigation against Nipro regarding the infringement and validity of a European patent related to a medical device in the field of dialyzers. The case was heard by the Paris Court in May 2024 and the first instance decision was issued in September 2024.| |An appeal was lodged against this first instance decision. Benjamin May’s IP team now assists Fresenius Medical Care before the Paris Court of appeal. The case is currently pending.
Assisted Preformed Line Products successfully in several investigation orders in various locations, as well as enforcing EP patents against competitors on the market of telecommunications connectors.
Assisted Zentiva in a major patent case brought by a major actor in the medical sector based on a patent infringement and unfair competition.
Lawyers
Leading partners
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Practice head
Benjamin May; Frédéric Sardain
Other key lawyers
Tristan Cassagne