Charles Liu

Dr. Charles Liu

Baker & McKenzie LLP


Dr. Chaoxuan “Charles” Liu is an associate in Baker McKenzie's Intellectual Property Practice Group in Dallas. Charles has been working in patent law since 2012 and over the years has acquired substantial experience in various IP areas including patent prosecution, post-grant trials, patent litigation, opinions, and transactional work. Holding a Ph.D. in electrical engineering, Charles is a co-inventor of multiple U.S. patents and a co-author of many scientific journal articles and conference presentations that have been cited hundreds of times by researchers around the world.

Practice Focus

Charles’s practice focuses on IP litigation and patent prosecution. His experience covers a wide spectrum of technology fields such as semiconductors, sensors, telecommunications, circuits & electronics, data processing, software applications, identification & security technologies, among others.

Representative Legal Matters

  • Drafted and successfully prosecuted hundreds of high-tech patent applications.

  • Helped secure a win for a major welding equipment manufacturer as plaintiff against its competitor in a multi-patent infringement case at the Eastern District of Texas, which resulted in a consent judgment with a three-year injunction against the accused products and a substantial settlement payment.

  • Supported an investigation at the ITC for a leading 3D display provider as complainant against its competitor, obtaining a favorable final determination.

  • Served as technical lead in two inter partes reviews (petitioner) at the USPTO that invalidated all claims asserted in parallel district court litigation, leading to dismissal of entire patent from litigation.

Professional Associations and Memberships

  • State Bar of Texas
  • Dallas Bar Association
  • Dallas Asian American Bar Association


  • Texas~United States (2018)
  • U.S. Patent and Trademark Office~United States (2017)


  • Southern Methodist University (JD, magna cum laude, Senior Articles Editor - SMU Science and Technology Law Review) (2018)
  • Louisiana State University (PhD Electrical Engineering) (2012)
  • Louisiana State University (MS Electrical Engineering) (2008)
  • Huazhong University of Science and Technology (BE Control Engineering) (2006)


  • English
  • Mandarin


Author, “Fixing secondary considerations in patent obviousness analysis,” 60 IDEA 352 (2020)

Co-inventor, “Apparatus and method for nanocomposite sensors,” U.S. Patent No. 9,518,878, December 2016

Co-inventor, “Apparatus and method for nanocomposite sensors,” U.S. Patent No. 9,099,224, August 2015

Co-author, “Analyzing resistance response of embedded PDMS and carbon nanotubes composite under tensile strain,” Microelectronic Engineering, 2014

Co-author, “Improved dispersion of carbon nanotubes in polymers at high concentrations,” Nanomaterials, 2012