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David Por



Por David
David Por



David is a partner in the Intellectual Property and Litigation department of Allen & Overy Paris. David is an experienced patent litigator, whose practice concentrates primarily on complex and cross-border intellectual property disputes.

David’s practice focuses primarily on patent cases, in which he also advises on validity and freedom to operate issues. David has notably represented leading actors in the patent wars of the telecommunications sector, as well as numerous pharmaceutical companies in proceedings against generics.

In addition, David has also a strong experience advising clients on trade secrets matters, defamation disputes and media litigation.

David has also become a specialist of the interplay between intellectual property and competition law, and is regularly invited to speak at industry conferences on this topic. As such, he recently drafted the French Chapter of The second edition of the Intellectual and Antitrust Review.

David publishes regularly in the field of patent law. He notably co-authored the training manual for future UPC judges.

David is a member of the directing committee of the Intellectual Property Lawyers Association and on the board of directors of the European Patent Practitioners’ Association.

Band 3
Chambers Global/Europe 2022 - France (Intellectual Property: Patents)

"David Por is often acting on behalf of technology and pharmaceutical clients on patent infringement disputes. Client describe him as 'very strategic and knowledgeable,' while another interviewee adds: 'He does what he says he is going to do, which makes it very easy to work with or against him'."
Chambers Global/Europe 2022 - France (Intellectual Property: Patents)

Leading Individual
Legal 500 2022 - France (Intellectual Property: Patents)

"David Por concentrates primarily on complex and cross-border intellectual property disputes, with a particular focus on high-tech patent litigation."
Legal 500 2022 - France (Intellectual Property: Patents)

"Laetitia Bénard and David Por both work tirelessly."
Legal 500 2022 - France (Healthcare & Life Sciences)

Recommended Individual - “very strong opponent”
Juve Patent 2022 - France (IP / Patent)

Patent star 2021
Managing IP 2021 - France Intellectual Property)

IAM Patent 1000 2021 - France (IP/Patent)

Leading Individual

Chambers Global/Europe 2021 - France (Intellectual Property: Patents)

"David Por has great grasp of the facts and is the type of lawyer you would want to have. He is well versed to assist with patent infringements and disputes. He is experienced representing major corporate clients from the technology, pharmaceutical and telecoms sectors."

Chambers Global/Europe 2021 - France (Intellectual Property: Patents)

Recommended Individual 

JUVE Patent 2021 - France (IP/Patent) 

Best Lawyer - Intellectual Property 
Best Lawyer Awards 2021 - France

Global Leader

IAM Patent, 2021

"David Por is the figurehead on the high-technology side, recently fighting the corners of Samsung Electronics France and Archos. He is an expert at the intersection of IP and competition law." 
IAM Patent 1000 2020 - France
David Por - Ranked Gold in litigation
IAM Patent 1000 2020 - France

Leading Individual

"First choice in France." 
Juve – France, 2020

Band 3
Chambers Global/Europe 2020 - France (Intellectual Property)

David Por is well reputed for his contentious IP practice, frequently acting for clients on both domestic and cross-border patent infringement proceedings. Sources are full of praise, with one remarking: "Everything is of the highest quality."
Chambers Global/Europe 2020 - France (Intellectual Property)

"Partner David Por is also an authority on cross-border patent litigation, as a veteran of the telecoms patent wars and multiple high-profile actions on behalf of pharmaceutical innovators against generics, he is most comfortable handling matters at the intersection of IP and competition law." 
IAM Patent 1000 2019 - France

David Por - Ranked Silver in litigation
IAM Patent 1000 2019 - France

"David Por advises clients from the technology and healthcare sectors on contentious IP matters. He defended Samsung Electronics in a number of patent litigation cases initiated by Technicolor. One client praises his co-ordination and co-operation with his team, while another states: "He is dedicated, a hard worker and gives comprehensive analysis."" 
Chambers 2019 - France (Intellectual Property)

“IP Star” 
Managing IP 2018 – Patents

"The ‘very thoughtful’ David Por has ‘good analytical and communicative skills’." 
Legal 500 EMEA 2017 – France (Intellectual Property: Patents)

"The multifaceted David Por, 'a very promising practitioner who has all the keys to continue expanding his business'." 
IAM Patent 1000 2017 – France

"The ‘pragmatic and tenacious’ David Por is recommended." 
Legal 500 EMEA 2016 – France - (Intellectual Property: Patents)

"David has excellent written advocacy skills, pragmatic business sense and charm." 
IP Stars - Managing IP 2016-2017 (Patent contentious)

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52 avenue Hoche
75008 Paris

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Admitted to the Bar, Paris, 2003


Graduate Degree, International and European Law, University of Paris X (Nanterre), 2000

Sciences Po Paris, 1998

Published work

  • Co-author of the sections of the training manual for UPC judges on the patentability of pharmaceutical and biotechnological inventions and on Articles 123(2) and 123(3) EPC
  • SEP owners and their FRANC obligations, Intellectual Property Magazine, November 2015
  • CJEU ruling in Huawei/ZTE leaves the door open to injunctive relief in SEP litigation, Allen & Overy publication, July 2015
  • Spain v UPC: pragmatic ruling sees CJEU step away from patents, IP Magazine, May 2015
  • CJEU gives green light to implementation of the Unified Patents Court, Allen & Overy publication, May 2015
  • Advocate General Wathelet takes the 'middle path' in Huawei v ZTE, Allen & Overy publication, November 2014
  • The 17th cut of the UPC Rules of Procedure: the highlights, Allen & Overy publication, November 2014
  • Adapter la justice à la vie des affaires, Le Nouvel Economiste, October 2014
  • Weighed and measured, but will it be found wanting? Where is the CJEU with Spain’s legal challenge to the unitary system?, IPPro Magazine, August 2014
  • Spain acts the CJEU to annul the new unitary patent system, E-Commerce Law & Policy, July 2014
  • La juridiction unifiée du brevet (JUB) reçoit un soutien croissant des entreprises, Options Droit et Finance, July 2014 co-authored with Laëtitia Bénard
  • Overview of Life Sciences Law in France, Chambers and Partners Guide of Life Sciences 2013, co-authored with Laëtitia Bénard, Olivier Fréget and Olivia Klimis
  • Guilty even when proved innocent, Managing Intellectual Property, December 2010- January 2012
  • Recent evolutions and foreseeable trends of French product liability rules: apocalypse later?, Revue internationale de droit comparé, April-June 2002, co-authored with Olivier Debouzy
  • Product liability: French law under scrutiny, Les Echos, May 2002