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Yen-Shyang  Tseng
Yen-Shyang Tseng

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Yen-Shyang Tseng

Yen 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 matters, including attorney disqualification. Yen 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.

Yen is an associate at the firm.  Before joining Horvitz & Levy, Yen was an associate at the trial boutique Keller/Anderle LLP.  Yen 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.

Yen graduated magna cum laude from Washington University School of Law, where he was elected to the Order of the Coif.  He also served on the editorial board of the Washington University Journal of Law and Policy.  Yen obtained his undergraduate degree in Economics, with highest honors, 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 Bus. J.
  • Governing Virtual Worlds:  Interration 2.0 (2011) 35 Wash. U. J. L. & Po’ly 547.