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Hsuanyeh Chang, PhD, Esq.

Patent Attorney & Attorney at law


Dr. Chang believes that the key to competent representation in patent matters is the ability to quickly and fully understand the technology involved in each case. Dr. Chang has extensive experiences with both general practice and boutique law firms, as well as both international and startup technology companies. In addition to English, Dr. Chang is fluent in Mandarin Chinese and conversational in German. Dr. Chang has drafted and prosecuted patent applications in the U.S., China, and Taiwan. He has also represented parties in patent litigations before the US district courts and in post-grant proceedings before the U.S. Patent and Trademark Office for patents in concurrent district court litigations, resulting in favorable settlements for the client.


  • JD from Suffolk University Law School of Boston, Massachusetts
  • PhD in Theoretical Condensed Matter Physics from the City University of New York
  • MS and BS in Nuclear Physics from Chung Yuan Christian University in Taiwan
  • AA in English (major) and German (minor) from Wenzao Ursuline University of Languages in Taiwan

Technical Expertise

  • Computer software
  • Computer hardware
  • Semiconductor
  • Electronics
  • Mechanics
  • Optics
  • Medical devices
  • Nanotechnology
  • Bioassay
  • Liquid Crystal Displays (LCD)
  • Organic Light Emitting Diodes (OLED)
  • Telecommunication
  • Electronic circuits
  • Signal processing

Legal Experience

  • Preparation and prosecution of patent and trademark applications
  • Post-grant proceedings (ex parte reexam, inter partes review, etc.)
  • Patent litigation in the US district courts
  • Appealing lower tribunal decisions
  • Formulating in-house patent strategies
  • Managing patent portfolios
  • Licensing intellectual property
  • Designing around competitor’s patents
  • Training R&D engineers on patent law basics

Practice Admissions

  • Massachusetts
  • New York
  • U.S. Patent and Trademark Office (USPTO)
  • U.S. District Court for the District of Massachusetts
  • U.S. District Court for the District of Colorado
  • U.S. Court of Appeals for the Federal Circuit (CAFC)
  • U.S. Supreme Court


  • Included in Lawyers of Color’s 2014 Hot List
  • Selected as a 2014-2015 Global Fellow of the Federal Circuit Bar Association
  • Selected to "Rising Stars" by "Super Lawyers" of Thomson Reuters in 2022

Let's work together

Contact Us


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