Ko-Fang Chang counsels clients ranging from Fortune 500 companies to start-ups on strategic patent portfolio development, with emphasis on patent prosecution in electrical and computer- related technologies. He works closely with clients and leads teams of skilled attorneys in prosecuting patent applications in both the U.S. and foreign countries. He develops strategy to address key infringement and validity issues at various stages of licensing and litigation. In addition, he performs due diligence investigations, freedom-to-operate studies and non-infringement/invalidity opinions on behalf of clients.

Mr. Chang also serves as co-chair of the firm's Patent Reexamination & Inter Partes Disputes Team. He has extensive experience handling ex parte and inter partes reexaminations. He has also filed one of the first petitions for initiating inter partes review before the Patent Trial and Appeal Board.

Prior to his legal career, Mr. Chang was an electrical engineer at ViaSat, Inc., where he designed hardware and software for satellite communication systems.

Mr. Chang was named a top patent practitioner in 2019 and 2020 by IAM Patent 1000 – The World's Leading Patent Practitioners. In 2011, the Silicon Valley/San Jose Business Journal honored Mr. Chang as one of Silicon Valley’s Top 40 Under 40. He was recognized for his outstanding legal practice and his contributions to the Asian Law Alliance, which provides legal services to low-income individuals in areas of domestic violence, employment, and housing in Santa Clara County.


Represented Motorola Mobility in an inter partes review challenge of U.S. Patent No. 7,516,484 relating to a reader adapted for a portable computer. The Patent Trial and Appeal Board cancelled all claims challenged (as anticipated by prior act). United States Patent and Trademark Office Patent Trial and Appeal Board Case Number IPR2013-00010.


University of California, Boalt Hall School of Law, J.D. (2000)

Rice University, M.E., Electrical Engineering (1995)

Rice University, B.S., Electrical Engineering (1994)



Court Admissions

U.S. Patent and Trademark Office

Professional & Community Activities

American Bar Association, Member

Asian Law Alliance, Advisory Board

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