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Mathys & Squire LLP

Work 020 7830 0000
Fax 020 7830 0001

Ilya Kazi

Work 020 7830 0000
Mathys & Squire LLP

Work Department



Ilya heads up an IT, medical devices and cleantech sector practice. He is named in the IAM Strategy 300 as one of the world’s leading IP Strategists and has been widely recognised for his commercial, client-focused and strategic approach.  He has spent time in California working directly with some of the leading clients he now represents, so is fully attuned to US style and practice. 

Ilya is widely regarded as a real strategist with a strong commercial understanding. He enjoys giving hands-on strategic advice to his client base, who range from multinationals with substantial portfolios through to startups and growing companies or investors.

Ilya has recently had a string of successful opposition and appeal hearings, and several of these were cases he turned around after taking over part way through, a challenge he relished. Clients also value his sector knowledge and understanding, and he is often sought out for high level due diligence projects.

Ilya is a key part of the firms’ contentious practice and advises on exploitation and licensing, and on strategic and cost-effective commercial portfolio development. He is the author of numerous published articles on law and strategy.

Ilya is qualified by examination as a litigator and has handled substantial high court litigation for a UK based multinational, as well as appearing in person in the Intellectual Property Enterprise Court.


Ilya has a Masters Degree in Natural Sciences from Cambridge University, specialising in physics and having conducted research within the field of medical imaging. He qualified as a Patent Attorney in 1996, and holds a Certificate in Intellectual Property from London University. He has significant experience in electrical, electronic, communications and computing technologies, and Ilya previously worked at IBM, where he was involved in the development of network communications software.


Chartered Patent Attorney; European Patent Attorney; European Design Attorney; European Trade Mark Attorney; and High Court Litigation.


Cambridge University (MA Natural Sciences), specialising in physics and having conducted research within the field of medical imaging.


llya is a keen pilot and sailor.

London: TMT (technology, media and telecoms)

PATMA: Patent attorneys

Within: PATMA: Patent attorneys

Mathys & Squire LLP 'really stands out from the crowd' thanks to an engineering, IT and electronics team whose advice is 'extremely technical due to its prior engineering degrees' and which has 'an impeccable understanding of IP law', and a life sciences and chemistry team that possesses 'strong scientific knowledge combined with comprehensive knowledge of European patent law'. Key figures from the engineering, IT and electronics team include Ilya Kazi, who advised Abbott Diabetes Care on the management of its patent portfolio. Sean Leach assisted Sevcon with the due diligence of its patent portfolio as part of its $200m sale to Borg Warner. Dani Kramer has 'the ability to draft clear, actionable and commercially relevant patent claims'. Paul Cozens, Alan MacDougall, Jane Clark and Catherine Booth are also recommended. On the life sciences and chemistry team, Martin MacLean is 'very sharp' and 'has a deep understanding of the law and the procedures at the EPO'. Chris Hamer is 'an outstanding lawyer' thanks to his 'combination of industry knowledge and attention to detail'. David Miller has been managing the patent portfolio of EngMab, which is new subsidiary of Celgene. Monika Rai,  Philippa Griffin, Toby Simpson and James Wilding are other noteworthy names on the team.

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