Aleksey Zalesov

Ranked in Russia
IAM Research

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Highly recommended - Individuals: litigation

Since it was established three years ago, A Zalesov & Partners has cemented its reputation as one of the most renowned IP boutiques in Russia. “Everything is handled with a high level of speed and efficiency, and the team shows initiative and facilitates communication,” report clients. “The experts intimately understand Russian patent law and know the pitfalls to avoid, examining different angles and leaving no stone unturned.” The outfit has recently acted in a string of patent invalidation cases on behalf of industry titans such as Philip Morris, Novartis and R-Pharm, the Russian distributor of Bristol Myers Squibb-produced cancer treatments. Founding partner Aleksey Zalesov has made patent invalidation his specialism, having successfully invalidated more than 40 Russian and Eurasian patents since 1993. Educated at the Moscow Engineering Physics Institute, the engineering and physics don is described as a “superb litigator, experienced IP specialist and excellent team leader who handles all cases to a high standard”. The firm has also been chalking up the wins in patent infringement cases, going out to bat for Teva Pharmaceuticals against Hungarian company Geedeon Richter and bringing a two-year battle to close for AO Pharmasynthez. Leading on both matters was Irina Ozolina, who has appeared in more than 150 court and administrative IP disputes throughout her 18-year career and is also a safe pair of hands for transactional briefs. The similarly multi-talented Maria Makhlina combines patent litigation prowess with a keen nose for patent searching.  She drafts watertight patent and industrial design applications for companies and inventors from Europe, the United States and Japan.

Aleksey Zalesov's Profile

Aleksey Zalesov is the managing partner of A Zalesov & Partners and a Russian patent, trademark and design attorney, as well as a Eurasian patent attorney and attorney at law.

In addition to an LLM from the Moscow Academy of Law and a JD from the Russian Institute of Intellectual Property, Dr Zalesov holds a master’s in physics from the Moscow Physics Engineering Institute.

Dr Zalesov is a member of the Council on Intellectual Property of the Council of the Federation, one of the key contributors to the amendments to the Federal Law on Patent Attorneys, and an expert of the Quality Council of Rospatent.

Dr Zalesov has practised IP law since 1993 and has dealt with more than 480 judicial and administrative disputes protecting the rights and interests of key players in the IP field, as well as protecting them against unfair competition. Dr Zalesov has extensive experience in patent litigation, including infringement and validity trials.

Dr Zalesov supervises the firm’s entire practice, concentrating his professional efforts in patent litigation and invalidation disputes, especially in the life sciences. He also takes an active part in the most important trademark invalidation and litigation cases for the firm’s key clients.

Dr Zalesov has prevailed in many precedent-setting cases, including:

  • Russia’s first successful online trademark enforcement action and recovery of damages;
  • Russia’s first successful database copyright enforcement, with significant damages recovered;
  • Russia’s first successful recovery of moral damages in a patent infringement case; and
  • Russia’s first successful enforcement of an appellation of origin. 

He is the vice president of the Russian national group of the International Association for the Protection of Intellectual Property – after serving as president of the group for many years before 2020 – and vice president of the Russian Chamber of Patent Attorneys, after serving as the chamber’s president between 2012 and 2018.

Firm Profile

A Zalesov & Partners Patent & Law Firm is a full-service IP law firm that gives IP advice, handles litigation (patents, trademarks and designs) and provides services in patent, design and trademark prosecution before the Russian Patent and Trademark Office and the Eurasian Patent Office.

The firm’s partners have been working as a team in the IP field in Russia for more than 15 years. In 2017 they set up A Zalesov & Partners and strengthened their position in 2018-2020.

Founding partners Aleksey Zalesov and Irina Ozolina have over 20 years of IP protection experience, including representing major international firms in the most sophisticated patent and trademark litigation cases in Russia. The team is known for its very high success rate in patent invalidation and infringement trials (as representatives of both plaintiffs and defendants). Mr Zalesov, who is also the firm’s managing partner, is a seasoned litigator with great experience in high-stake cases.

The firm’s professionals have vast experience in IP law, combining IP litigation and prosecution services into one seamless package that always gives the opportunity to go one step further.

The partners believe that close cooperation between patent and trademark prosecutors and litigators in all stages of the IP work ensures the maximum benefits to their clients and helps secure stable IP rights with the largest possible scope of protection. The team members are keen to give a balanced and verified view in prosecution, always keeping in mind that the main goal of IP prosecution is the ability to enforce the IP rights effectively. The partners’ and other key individuals’ experience enables the team to view all aspects of their clients’ commercial needs and devise the most suitable strategy accordingly. The firm deals with IP enforcement and anti-counterfeiting, having successfully handled numerous court cases in different regions of the Russian Federation; the firm also frequently applies for customs border measures and has significant experience in representing clients before unfair competition bodies. Years of experience conducting IP disputes between leading players in Russia and abroad enable the team to provide clients with the best practical advice on IP protection and enforcement strategy.

The confidentiality of client-attorney information is protected by all possible legal and technical means – not least the fact that all partners are attorneys at law.


The dynamically growing team is formed by known and recommended IP litigators, as well as esteemed and experienced patent prosecutors. To give the clients all-inclusive services in IP protection, the firm can draw on its team members’ qualifications in different fields, with particular expertise in the life sciences, mechanics and applied science. The team’s expertise in invalidation and infringement disputes, along with deep knowledge and skills in different kinds of search, makes A Zalesov & Partners highly qualified to prepare freedom-to-operate and validity opinions – an activity in which the team has deep experience.


The firm handles both international clients’ patent and trademark portfolios (including Madrid System registrations) in Russia and neighbouring countries, including member states of the Eurasian Custom and Economic Union, as well as local clients’ IP portfolios in Russia and abroad. Most of the firm’s clients are well-known multinational companies working in the field of pharmaceuticals, biotech, electronics and food technologies. The firm has been protecting many of these clients’ IP rights for years.

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