Yinfei Wu has significant experience in trademark, copyright, and advertising law in both the United States and China. She advises clients and works closely with counsel around the world on trademark usage, counseling, clearance, prosecution, domestic and worldwide portfolio management, oppositions, cancellations, invalidations, litigation, and enforcement matters.
Yinfei offers trademark and anti-counterfeiting counseling to various Fortune 500 companies. She conducts searches and manages global trademark prosecution and enforcement matters for many publicly traded companies. Yinfei also handles opposition, cancellation, expungement, and reexamination proceedings before the Trademark Trial and Appeal Board (TTAB) of the U.S. Patent and Trademark Office (USPTO), litigation in district courts, and investigations before the U.S. International Trade Commission (ITC). She has been ranked regionally for her contributions to the fields of prosecution and strategy by the World Trademark Review (WTR).
Yinfei’s practice related to China focuses on enforcing clients’ rights against counterfeiters and managing civil and criminal anti-counterfeiting actions. Through a clerkship with the City Attorney’s Office of Nanjing, China, she assisted in prosecuting counterfeit product manufacturing and false designation of source of goods claims. Notably, Yinfei clerked and managed trademark litigation at two High Courts on the provincial level and the Supreme Court of China.
Yinfei offers experienced legal analysis and has worked on solutions for infringement risk-management matters. Her legal education and cultural background further allow for effective communication between clients and opposing parties during licensing negotiations, settlement conversations, and litigation.
Yinfei devotes time to pro bono matters, including working with the Advocates for Human Rights and for the Mille Lacs Homeless Connect.
In the Matter of Certain Semiconductor Devices and Products Containing the Same
Achieved a comprehensive victory for respondent Innoscience, a global leader in gallium nitride (GaN) power devices, in a high-profile patent dispute before the U.S. International Trade Commission (ITC). The ITC’s Final Determination confirms that Innoscience avoided all patent claims asserted by Infineon.
337‑TA‑1414, ITC, Judge Moore
Tianhai Lace Co. Ltd. et al. v. ASOS PLC. et al.
22-cv-09752, S.D.N.Y., Judge Abrams
Certain Plant-Derived Recombinant Human Serum Albumins ("rHSA") and Products Containing Same
337-TA-1238, ITC, Judge McNamara
Under Armour v. Uncle Martian (China)
Obtained preliminary and permanent injunctive relief and damages in high-profile infringement in China. The Supreme People’s Court, the highest court in China, affirmed the decision, securing a complete win for Under Armour.
Fujian Higher People's Court
Webinar
Generative AI Meets Copyright Law: US and UK Perspectives Generative AI Meets Copyright Law: US and UK Perspectives
April 1, 2026
Webinar
Conference
WTR Live: Brand Strategy Summit Asia WTR Live: Brand Strategy Summit Asia
December 2-3, 2025
Webinar
Navigating Issues Concerning AI and Copyright: What Asia-Based Practitioners Should Know from the UK and US Navigating Issues Concerning AI and Copyright: What Asia-Based Practitioners Should Know from the UK and US
July 10, 2025
Webinar
Workshop
Suzhou IP Protection Center Foreign Trade Workshop Suzhou IP Protection Center Foreign Trade Workshop
May 28, 2025
Suzhou
Seminar
A Practical Guide to Intellectual Property Practice Under Cross-Border Compliance New Challenges A Practical Guide to Intellectual Property Practice Under Cross-Border Compliance New Challenges
April 18, 2025
Suzhou
Articles
2025 Licensing Update: Trademark Licensing 2025 Licensing Update: Trademark Licensing
April 7, 2025
"Yinfei Wu is in high demand among Fortune 500 companies, valued for her sage counsel and deft management of complex, cross-border trademark portfolios."
World Trademark Review WTR 1000
"Yinfei Wu is in high demand among Fortune 500 companies, valued for her sage counsel and deft management of complex, cross-border trademark portfolios."
World Trademark Review WTR 1000
Press Release
Finnegan Secures Decisive ITC Victory for Innoscience in Final Determination Finnegan Secures Decisive ITC Victory for Innoscience in Final Determination
May 11, 2026
Commentary
CBP Clears Redesigned Innoscience Chips After ITC Case CBP Clears Redesigned Innoscience Chips After ITC Case
March 12, 2026
Law360Award/Ranking
In the 2026 World Trademark Review 1000, Finnegan Called “The Best of the Best” In the 2026 World Trademark Review 1000, Finnegan Called “The Best of the Best”
February 2, 2026
World Trademark ReviewPress Release
Finnegan Secures Major ITC Victory in Initial Determination for Innoscience Finnegan Secures Major ITC Victory in Initial Determination for Innoscience
January 29, 2026
Media Mention
ASOS Must Face Lace Maker's Design Copyright Suit ASOS Must Face Lace Maker's Design Copyright Suit
May 17, 2023
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