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Intellectual property: PRC firms

China Patent Agent (H.K.) Ltd.

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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.'

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.