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Ilya Kazi


UK & European patent attorney

MA (Cantab), EPA, CPA

Ilya leads teams cost-effectively managing substantial portfolios numbering tens, hundreds and even thousands of patents for a number of substantial multi-national corporations. He also still enjoys giving hands-on strategic advice to startups and growing companies or investors on IP strategy and personally handling complex oppositions and appeals before the EPO. The ‘insightful, analytical’ and ‘exceptional’ Ilya has been recommended in the 2019 and 2018 editions of IAM Strategy 300 for being ‘the ideal IP strategist – he gets people on side easily and quickly, has no airs or graces and puts clients first every time.’ He has also featured as a Recommended Individual in the 2020 and 2019 editions of IAM Patent 1000, where he is described as an ‘esteemed electronics expert’; his ‘particular skills at managing complex technical and procedural matters before the EPO’ (2020) are highlighted; and sources comment that he is ‘trusted to handle commercially vital disputes’ (2019). Ilya is ranked as a ‘Patent Star’ in the latest edition of Managing IP’s IP Stars directory, in which he has been featured for a number of years.

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Ilya has handled approaching 4,000 applications across the spectrum of electrical, electronic, communications, compression, computing, display and optical technologies, clean technologies including heat pumps and energy recovery and control systems, battery technologies, materials and nano-technology, bio-informatics, robotic surgery, diagnostics and medical devices of all descriptions. He is also a private pilot with interest in and experience of aeronautical, aerospace and defence equipment, engines, control systems and composite construction techniques and advising on obtaining strategic protection relevant to certification. Ilya obtained first-hand experience of US patent law and practice within a major Silicon Valley law firm, which now enables him to provide his clients with creative and comprehensive advice as to how to obtain the maximum level of worldwide protection for their technology, or to deal effectively and pragmatically with the portfolios of competitors. 

As well as extensive and exceptionally successful experience of European Patent Office opposition and appeal proceedings, Ilya has been involved in commercial dispute resolution within formal mediation proceedings and litigation in the Intellectual Property Enterprise Court and English High Court and he has successfully creatively negotiated positive outcomes for clients charged with infringement on several occasions. He also advises on exploitation and licensing and on strategic and cost-effective commercial portfolio development and is the author of numerous published articles on law and strategy. Ilya has been noted on several occasions in Legal 500 and in Chambers and has featured for the last three years in the IAM Strategy 300 list of the world’s leading IP strategists. 

Ilya works with a number of startups and investors from angels to larger VCs and has been involved in putting together IP behind nine-figure exits (as well as many smaller ones). He also serves on the Chartered Institute of Patent Attorneys committee devoted to raising public awareness of IP and has provided expert commentary on numerous strategic IP issues for national and international media including CNN, Channel 4, The Times, The FT, The Daily Telegraph and The Economist.

Ilya is qualified as a Higher Courts Patent Litigator by examination. He recently successfully defended British Gas, alongside Margaret Arnott and Miranda Kent, against a £30m claim in Meter tech v British Gas. To read more about the case please click here


Ilya has a master’s degree in Natural Sciences from the University of Cambridge, 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 the University of London.

Recent work

Much of Ilya’s recent work has been a string of successful oppositions and appeals in the IT and medical devices sectors, including revoking a key patent for Gogo LLC relating to in flight WiFi and a number of optical and diagnostic matters.

Memberships & organisations

Ilya is a member of CIPA, EPI, AIPLA, AIPPI, LES, FICPI and AOPA.



Esteemed electronics expert Ilya Kazi “has particular skills at managing complex technical and procedural matters before the EPO and is seldom, if ever unsuccessful in matters he handles”.

IAM Patent 1000 (2020)

Ilya Kazi is “second to none in being able to sit down with a new client and get straight to the crux of the issue they need to resolve. He is excellent both in detail and in longer term strategy, very often coming up with business directions that the clients have not thought of.”

The Legal 500

“I recommend Ilya Kazi as an outstanding IP attorney – and particularly for opposition work. He has been very creative and effective in representing us in oppositions before the EPO – and he’s also fun to work with.”


“Ilya is a superb tactician whose imaginative strategies can provide real commercial advantage. I almost feel sorry for the opposing team when Ilya is on mine. Ilya’s wiles and cunning are bolstered by the enormous passion that he brings to his work. Ilya really does make possible outcomes that most others would never believe possible. ”


“We have used Ilya as lead global patent counsel for general patent filing strategies, patent searches and patent drafting/filing. I recommend him because of his commercial approach, strong intellect, detailed scientific/technical field knowledge, talent as a strategist and motivation to deliver the best outcome for his clients.”

Barlowood Handling

The “insightful, analytical” Ilya Kazi is “exceptional”. “He is the ideal IP strategist – he gets people on side easily and quickly, has no airs or graces and puts clients first every time”.

IAM Strategy 300 (2019)

Ilya has been noted as “a talented strategist”, “a master of his craft”, and recommended for his “great knowledge of the medical device sector; he gives suggestions instead of just taking instruction”.

The Legal 500

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