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Yen-Shyang  Tseng
Yen-Shyang Tseng

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Yen-Shyang Tseng

Yen-Shyang Tseng is an associate at the firm who has appellate and trial court experience in complex litigation matters involving patent law, trade secrets, partnership, shareholder disputes, products liability, insurance bad faith, and professional liability and ethics, including attorney disqualification.  Mr. Tseng has represented clients in the California Supreme Court, the California Court of Appeal, the United States Court of Appeals for the Ninth Circuit, and in state and federal trial courts.

Before joining Horvitz & Levy, Mr. Tseng was an associate at the trial boutique Keller/Anderle LLP.  Mr. Tseng previously served as a law clerk to the Honorable Joseph R. Goodwin of the U.S. District Court for the Southern District of West Virginia.

Mr. Tseng graduated magna cum laude from Washington University School of Law, where he served on the editorial board of the Washington University Journal of Law and Policy and was elected to the Order of the Coif.  Mr. Tseng obtained his undergraduate degree in Economics, summa cum laude, from Georgia Tech.


  • My First Appellate Argument (2017) Cal. Litig., Vol. 30, No. 1
  • Willful Patent Infringement and Enhanced Damages After Halo Electronics Inc. v. Pulse Electronics, Inc. (2016) Orange County Law.
  • Companies Can Get Hammered for Willful Patent Infringement, Say Supremes (July 18-24, 2016) Orange County Business Journal
  • Governing Virtual Worlds: Interration 2.0 (2011) 35 Wash. U. J. L. & Pol'y 547