Jonathan has a great deal of experience in the development and management of trade mark portfolios for a broad range of clients. He is also a regular speaker on trade mark issues in various contexts including for INTA and WIPO.

He helps set up and maintain commercially relevant opposition strategies for his clients. Handling oppositions and appeals across many jurisdictions forms a significant part of his practice. He has particular experience in resolving disputes by negotiating commercially practical agreements on behalf of his clients.

Jonathan has long-standing relationships with many of his clients. His commercial understanding of their businesses helps him deliver sophisticated and appropriate advice. Clients like his grounded approach and his clear focus on practical and workable solutions. As a result of his work for multinational clients, he is experienced in IP issues across diverse commercial sectors including finance, pharmaceutical, medical, power systems, fashion, retail and tobacco. He is active in many other commercial areas as well, not least due to his extensive collaborations with SMEs.

Jonathan has been a contributing author of all three editions of Wolters Kluwer’s Concise European Trademark and Design Law, writing the commentary on about 30 Articles of the EUTMR and the corresponding provisions of the CDR. This book was recently divided into separate volumes for trade marks and designs. He has also been the Editor of a new international title in The Law Reviews series called The Trademarks Law Review since its launch in 2017, now in its third edition.

  • Partner 1996
  • IPReg Board Member 2012-2019
  • Trade marks
  • Portfolio management
  • Contentious matters
  • Negotiations
  • MA Classics, Magdalene College, Cambridge
  • Registered Trade Mark Attorney 1992
  • Fellow of the Institute of Trade Mark Attorneys 2002

“Jonathan Clegg is a trade mark attorney relied upon by household-name and emerging brands to file and enforce their rights before registries, to support them in litigation and to advise on anti-counterfeiting programmes.”

Chambers and Partners, 2020

“Trademark attorney of 30 years’ vintage Jonathan Clegg 'knows trademarks inside out.' Practical and strategic, he is the consummate trademark attorney. With the ability to handle a broad range of sophisticated prosecution, global portfolio management and complex opposition proceedings work in the United Kingdom and the European Union, he is unflappable in his demeanour and widely respected within the trademark community.”

World Trademark Review 1000

“Named as a Trade Mark Star 2020 in Trade mark proceedings, Trade mark prosecution, and Trade mark strategy & counselling.”

IP Stars

“Jonathan Clegg is the most knowledgeable attorney in EU law that I have had the privilege to work with.”

Client Testimonial (2018) in IP Stars
Jonathan Clegg's posts

Articles, Videos & Podcasts