Clifford Chance operates comfortably across cross-border litigation, infringement, revocation, and transactional matters, withparticular strength in the technology, life sciences, and energy sectors. The team coordinates pan-European disputes, including UPC cases, and advises on licensing, trade secrets, and regulatory issues. Practice head David Por joined from A&O Shearman in March 2025 and focuses on high-profile patent enforcement and SEP/FRAND disputes. A dual-qualified lawyer and engineer specialising in patent litigation, Cyril Riffaud joined alongside Por.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- ‘They are very good, one of the best on patent litigation in France, especially in an international context. Further, they have very strong teams also in other jurisdictions.'
- ‘David Por is an excellent patent litigator. He is fluent in French and English and makes innovative arguments, even when case law might be against him.’
Key clients
- Air Liquide
- MGI
- Nokia
- Samsung Electronics
- Assa Abloy
- Eastern Pacific Shipping
- Archos
- TotalEnergies
- 3M
- Nobel Biocare
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Cyril Riffaud
Practice head
David Por
Other key lawyers
Cyril Riffaud