Chang Tsi & Partners has been officially selected to the first cohort of the “Precision Patent Service Support Institutions List” released by the All-China Patent Attorneys Association. This national initiative aims to elevate the quality of patent agency services, encourage targeted support capabilities, and bolster China’s innovation-driven development strategy. The inclusion of Chang Tsi & Partners highlights its long-standing leadership in delivering high-quality, strategic intellectual property (IP) services.

Founded in 2002, Chang Tsi & Partners has built its reputation as a leading IP law firm consistently recognized by Managing IP and ranked in the IAM Patent 1000 global guide. It is also a top-tier “5A” agency as rated by the Beijing Patent Attorneys Association. With a robust and highly specialized patent practice, the firm brings together a multidisciplinary team of experienced patent attorneys, litigators, and technical consultants, with deep expertise across high-tech sectors such as telecommunications, biotechnology, artificial intelligence, and semiconductors.

Chang Tsi & Partners is also distinguished by its global patent strategy capabilities. In addition to its mastery of Chinese patent law and procedures, the team is well-versed in international systems including PCT, EPO, and USPTO filings. The firm delivers high quality and tailored solutions that are both globally aligned and commercially impactful.

Quality and precision are central to the firm’s service ethos. Every step—from reviewing technical disclosures and drafting patent filing documents to responding to office actions—is subjected to multiple layers of internal review. This rigorous quality control system not only enhances grant success rates but also strengthens the long-term enforceability of patent rights. 

Beyond prosecution and enforcement, the firm places strong emphasis on the commercialization of patents. Through services such as patent analytics, freedom-to-operate (FTO) assessments, and licensing/assignment negotiations, Chang Tsi helps clients unlock business value from their IP assets.  For example, during the technology transfer process between two companies, through meticulous due diligence and comprehensive patent analysis (including stability analysis and infringement analysis), the team provided recommendations for the value of the technology assets to the purchaser, helping the purchaser save significant costs in technology transfer.

As demand grows for high-quality, industry-specific patent services—particularly in strategic sectors like 5G, semiconductors, clean energy and AI—the firm is committed to evolving in step with technological and policy trends. Its patent team continues to help clients develop high-value patent portfolios, strengthen market competitiveness.