James Yoon is a practice development leader of Wilson Sonsini Goodrich & Rosati's IP litigation department. James' practice focuses on patent litigation and IP counseling. James has more than 20 years of experience as an intellectual property litigator and counselor. He has litigated over 100 patent cases and has tried numerous cases in federal and state courts. In addition, he has tried numerous cases at the International Trade Commission.  James has an active IP counseling practice. He has advised over 40 companies on IP issues in a wide variety of transactions, ranging from patent licensing agreements and asset purchase agreements to initial public offerings (IPOs) and corporate mergers. James is frequently involved in IP risk assessments and valuations.

James served as a member of the committee that developed the original and the revised versions of the Model Patent Jury Instructions for the Northern District of California. Additionally, James is a Lecturer-in-Law at Stanford Law School, where he is a trial advocacy instructor and teaches an economics course on the forces transforming the private practice of law.  He is also an adjunct professor (Lecturer-in-Law) at Santa Clara University School of Law, where he teaches a course in patent and trade secret litigation.  He has published numerous scholarly and professional articles and is a columnist on patent law and litigation for the ABTL Report of the Northern California Chapter of the Association of Business Trial Lawyers (ABTL).

In 2013 and 2014, James was listed in the International Who's Who of Patent Lawyers.  In 2009, 2010, 2011, 2012, 2013, and 2014, he was selected for inclusion in Northern California Super Lawyers in the field of Intellectual Property Litigation. In 2006, Bay Area Lawyer Magazine named James one of the "Top Lawyers in the Bay Area" for Intellectual Property law.

James has served on numerous firm committees. He is a current member of the Compensation Committee and has previously served on the firm's Policy, Partner Nominating, Business Development, and Associate Development committees.

James is a member of the board of directors and a co-chair of the Partner Committee of the Asian Pacific American Bar Association Silicon Valley (APABA-SV). He is also a member of the board of directors of the Palo Alto Bar Association, and a member of the High Tech Advisory Board for Santa Clara Law School.

James served as a law clerk to Chief Judge Alan C. Kay in the U.S. District Court for the District of Hawaii. He was previously an electrical engineer for General Motors Corporation, where he worked for many different operations, including the General Motors Technological Center (Warren, Michigan), Opel Motors (Russelsheim, Germany), Vauxhall Motors (Luton, England), and GM's Cadillac Assembly Plant (Detroit, Michigan).