Sean D. O’Brien



503-222-3613 |


  • J.D. – Loyola Law School
  • B.S. in Fluid and Thermal Engineering – Case Western Reserve University


  • United States Patent and Trademark Office
  • United States District Court for the Central District of California
  • United States District Court for the Northern District of California
  • United States District Court for the District of Oregon
  • State of California
  • State of Oregon

Sean’s practice focuses on assisting clients with obtaining patent, trademark, and copyright protection throughout the world, while meeting the clients’ goals in a candid, proficient, and cost-effective manner. Sean also has years of experience in asserting and defending patent, trademark, and copyright infringement matters in federal court litigation and before the U.S. Patent and Trademark Office; resolving disputes outside of litigation; and negotiating licensing and settlement agreements. Also, Sean advises and represents clients for Post Grant Review and Inter Partes Review patent proceedings before the U.S. Patent Trial and Appeal Board.

While attending Loyola Law School, Sean was a member of the intellectual property moot court team and was also Chief Production Editor of the Loyola of Los Angeles Law Review. Sean received the First Honors Award for the highest marks in Trademark Law.

Before becoming a lawyer, Sean worked as a design engineer and project engineer at an aerospace company, where he designed, tested, and manufactured electro-hydraulic antiskid brake control valves for airplanes. Sean also worked in the automotive industry on door seal and electrical wiring-harness technologies.

Outside of work, Sean enjoys trying new restaurants with his wife, skiing, bicycling, hiking, camping, live music, and watching soccer.