Chang Tsi & Partners has been ranked among the Top 10 law firms in China for both trademark and patent services by the esteemed UK magazines The Trademark Lawyer and The Patent Lawyer. These rankings are based on comprehensive annual research designed to highlight law firms excelling in the IP and trademark sectors, acknowledge their contributions to the industry, and help clients choose the best firms to meet their needs.

The research team considers multiple factors in determining the top 10 firms in each jurisdiction, such as market reputation, achievements over the past year, unique strengths in specialized areas, client feedback, and the frequency and engagement of published informative materials.

Being listed among the Top 10 in China underscores Chang Tsi’s professional achievements and respected standing in the patent and trademark fields.

Founded in 2002, Chang Tsi’s patent department consists of over 60 patent attorneys, agents, and engineers. More than 70% of the team members hold postgraduate degrees, and over half of the core team has international study and work experience. The team has extensive practical expertise across a wide range of technical fields, including mechanical engineering, electronics, telecommunications, artificial intelligence, software, semiconductors, LCD panels, chemistry, biology, and pharmaceuticals. Guided by a client-first philosophy, Chang Tsi provides comprehensive one-stop services covering patent warning, mining, applications, examinations, reexaminations, invalidations, administrative litigation, infringement litigation, and licensing. Over 20 years of development, the firm has handled over 100,000 patent cases for domestic and international clients, gaining extensive case experience and earning widespread recognition and trust.

We are grateful for the trust and support of our clients and peers. Moving forward, we will continue to lead the industry and set new benchmarks in IP legal services.