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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

Intellectual property


Ilya Kazi has over two decades of IP experience and a substantial patent prosecution track record, with over 4,000 European patent applications to his name.

Although he leads highly respected teams and manages substantial portfolios numbering tens, hundreds or even thousands of patents for multinational corporations, Ilya maintains his involvement in complex day-to-day matters and enjoys giving direct business-focused strategic advice to startups, growing companies and investors. Ilya is also named as one of IAM 300’s world leading IP strategists.

Much of his personal practice is focused on opposition, appeal and litigation strategies and hearings. He is also a qualified UK higher courts litigator and has notably recovered substantial costs for a defendant that was sued by a non-practicing entity. He has been involved with due diligence – assisting both acquirers and companies wishing to be acquired – and advised both formally and behind the scenes on optimising value and navigating IP issues.


Ilya has an impressive record of success in contested IP matters. He has an unblemished record of success in UK High Court and Intellectual Property Enterprise Court cases and has obtained favourable outcomes for his clients – both patentees and opponents – in approximately 85% of the European Patent Office oppositions and appeals that he has handled.

Ilya is equally happy working with experienced in-house professionals and business decision makers with no specialist IP knowledge, and has been commended for his frank and clear boiling down of the sensible commercial options and being unafraid to predict the realistic expectations in potentially complex legal situations.


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


Stemming from a broad-ranging Master’s Degree in Natural Sciences from Cambridge University, Ilya’s technical specialisms include information technology, hardware and software, networking and communications technologies, video and audio processing and transmission, and electronics. He has significant expertise in a broad range of medical device technologies and can handle subject matter of a more mechanical nature, including robotic equipment and controls, heat pumps and turbines, motive power and energy recovery and all aspects of energy-efficient technology.

London: TMT (technology, media and telecoms)

PATMA: Patent attorneys

Within: PATMA: Patent attorneys

Mathys & Squire LLP's life sciences and chemistry and IT, telecoms and engineering departments are among the most active and prestigious patent drafting and filing practices in the market. While the practice counts a high number of international corporations as its clients, it can also look back on a strong track record of prosecution work for start-ups and was appointed as a provider of intellectual property rights services for the North Eastern Universities Purchasing Consortium in 2018. Christopher Hamer and Martin MacLean direct the life sciences and chemistry group while Jane Clark and Ilya Kazi direct the IT and electronics department. Paul Cozens is the head of the engineering practice and the Cambridge-based Alan MacDougall leads the telecoms group. Hazel Ford joined as of counsel from Finnegan, Henderson, Farabow, Garrett & Dunner LLP and subsequently made partner. Of counsel Victoria Strachan, who joined from Wynne-Jones IP, has headed the Oxford office since it opened in late 2018, at the same time as the new Midlands office. Of counsel Alison Haile joined from Beresford Crump. Unless otherwise stated all practitioners are based in London. The firm also has offices in Brighton, Cambridge, Manchester and York, as well as three offices in continental Europe. Harvey Adams joined Carpmaels & Ransford LLP. Peter Garrett retired.

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