China Patent Agent (H.K.) Ltd. is a key port of call for both international and domestic enterprises for its contentious and non-contentious IP expertise, particularly active in patent prosecution across the pharmaceutical, electronics and manufacturing sectors. The practice is led by a seasoned trio, Yuhe Wu and Gang Hu from the Hong Kong office, alongside Beijing-based Yanfeng Xiong. Wu leverages over three decades of experience handling patent applications, litigation and invalidation, as well as Hu, who is well-equipped to handle both contentious and non-contentious trade mark, copyright and anti-unfair competition matters connected to intellectual property rights. Xiong has a particular specialism assisting with Standard Essential Patent (SEP) litigation and invalidations for telecoms multinationals. Peng Liu is noted for patent litigation and invalidations in the electronics sector, while Ke Ke is reputed for biochemistry and pharmaceutical cases.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
'CPA boasts a stellar team specialising in safeguarding clients’ innovations and strategising the creation and development of robust patent portfolios. Drawing on deep technical expertise across fields, the team doesn’t just file patents—they craft tailored strategies that align with each client’s business goals, whether that’s securing market exclusivity, fueling R&D investments, or strengthening negotiating leverage in partnerships.’
‘Yanfeng Xiong and his team bring a wealth of experience in securing patents, defending against challenges to patents, and strategically leveraging intellectual property to drive business growth.'
'The CPA team has deep expertise spanning technical fields. They excel not only in navigating the intricacies of patent prosecution—tailoring claims to maximise protection while aligning with global patent office standards—but also in fortifying patents against scrutiny, whether from competitor challenges, inter partes reviews, or invalidity proceedings.'
- 'What sets their work apart is a proactive, business-aligned approach.’
‘The law firm benefits from a broad legal expertise, which is in particular helpful for solving tricky issues. CPA is very knowledgeable about trends and legal developments. The patent work is of high quality.'
‘Yanfeng Xiong is excellent in catering to our needs and providing help with navigating the IP challenges in China’
Work highlights
Represented patentee KPN throughout the patent invalidation proceedings and subsequent administrative litigation. The patent in question is a standard-essential patent, and the patented technical solution aims to resolve the inability to collectively control and manage multiple media sessions and their network resources in IMS (IP Multimedia Subsystem) architectures. The court hearing for the second instance of this case, part of the Supreme People's Court Intellectual Property Court's 2025 "April 26th Intellectual Property Publicity Week," has garnered significant attention from the industry.
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.
Practice head
Yuhe Wu; Yanfeng Xiong; Gang Hu
Other key lawyers
Peng Liu; Ke Ke