Sangwoo Ahn focuses his practice on patent counseling, patent application drafting, and prosecution. To that end, he brings a wealth of patent prosecution knowledge to help clients obtain robust patent protection on their innovative technologies.

Sangwoo is a former primary patent examiner at the U.S. Patent and Trademark Office (USPTO) and has more than 12 years of prosecution experience focused on electrical and computer technologies. During his time at the USPTO, he reviewed patent applications covering a variety of technologies including database and file management, data search and retrieval, query optimization, document processing, data integrity, Internet-based technologies, cloud and distributed computing, business methods, graphical user interface, and e-commerce. He also trained and mentored new hires and junior examiners on various examining procedures, patent quality issues, interview practices, and negotiation strategies. Furthermore, Sangwoo clerked for an administrative patent judge at the USPTO’s Patent Trial and Appeal Board (PTAB), reviewing complex issues raised on appeals and assisting in drafting decisions.

Sangwoo is fluent in Korean.


  • Former primary patent examiner.
  • Clerked for an administrative patent judge at the PTAB.
  • During his senior year in college, designed a PDA-installable guitar tuner as a final project for Multimedia Digital Signal Processing class.

Bar Admissions

  • District of Columbia
  • Maryland
  • U.S. Patent and Trademark Office


  • The Catholic University of America, Columbus School of Law, J.D., cum laude, 2012
  • University of Maryland, College Park, B.S., Electrical Engineering, 2005


  • Korean American Intellectual Property Bar Association (KAIPBA), Member