
Lauded for its ‘sophisticated understanding of IP law’, Siegler Bird & Bird Ügyvédi Iroda is renowned internationally for its strength in the commercialisation and protection of IP rights. The firm excels in complex cross-border trade mark strategies and disputes, with a strong emphasis on the pharmaceutical, retail, and consumer sectors. The team routinely handles high-stakes patent activity, including compulsory licensing, SPC litigation, and patent nullity cases, demonstrating its significant capabilities in complex IP disputes. The IP practice is led by Bálint Halász, an ’exceptional legal leader’ handling contentious matters, patents, and mandates at the intersection of IT and IP law. Other key members are Ádám Simon for technology and comms IP due diligence and transactions, Patricia Beregszászi in patent litigation and trade secret protection, and Adél Gelencsér in trade mark prosecution and brand management.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Client satisfaction: Billing & efficiency
Client satisfaction: NPS ®
Testimonials
Collated independently by Legal 500 research team.
- Their operations are characterized by thorough research and comprehensive analysis. The team always works diligently, providing legal opinions that are both understandable and pragmatic. Their effective solutions and recommendations are executable in a multinational company.
- The firm demonstrates the utmost attention to their clients' business and legal interests. Their performance is consistently strong and outstanding, and they adapt flexibly to our expectations. They carefully select members of their team, choosing colleagues with appropriate experience who continuously develop themselves by effectively adapting to daily challenges, the international environment changes, and innovations.
- Prompt answers. Practical solutions. Very good management summaries. Understandable historical background analyses.
- The firm's lawyers possess outstanding communication skills, demonstrate exceptional creativity, and adapt quickly to the tasks assigned. It is also important to highlight their positive and pleasant personalities, which greatly facilitate our cooperation.
- ‘They managed an infringement case and demonstrated specialised IP knowledge in trade mark and copyright infringement cases, including experience in administrative and judicial enforcement. Moreover, they coordinated with local counsel to ensure compliance with local laws and effective enforcement strategies and provided advice and managed litigation risks efficiently.’
- ‘The Budapest team at Bird & Bird is consistently diligent and highly committed, providing us with the most accurate and comprehensive information and client service every time. Their responsiveness, service-oriented approach, and deep understanding of our priorities mean they are always available, especially for sensitive issues. We genuinely feel like VIP clients, consistently receiving first-class service.’
Key clients
- Vesta Software Group
- Rohlik Group
- Iron Mountain Inc.
- Zone Europe Kft.
- Consorzio Tutela Aceto Balsamico di Modena
Work highlights
Advised Vesta Software Group, one of the operating groups of Constellation Software, Inc. (a company listed on the Toronto Stock Exchange), on the acquisition of Béker-Soft Informatika Kft. from its founders.
Advised Rohlik Group on the full scope of brand portfolio management services and trade mark enforcement in several jurisdictions in which it operates.
Advised the US-based information management services company Iron Mountain Inc. on its acquisition of Wisetek Solutions, the Ireland-based provider of end-to-end IT asset disposition and manufacturing services.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Bálint Halász
Other key lawyers
Ádám Simon; Patrícia Beregszászi; Adél Gelencsér

