Katherine Cappaert is an attorney in the firm’s Patent Litigation and Post Grant Proceedings practice groups. Her primary focus is on litigating patents in federal courts, and pursuing and defending against patent validity challenges before the Patent and Trademark Appeals Board in inter partes review and covered business method proceedings. Ms. Cappaert’s experience spans a wide range of technologies including cloud and distributed computing systems, consumer electronics and smartphones, chemical and pharmaceutical compositions, and automotive and geophysical technologies. Ms. Cappaert also has experience with copyright and trade secret litigation matters.

In addition to litigating cases in federal courts and in post-grant proceedings at the United States Patent Office, Ms. Cappaert advises both domestic and foreign clients on litigation procedure and strategies, litigation avoidance, and protecting, exploiting, and enforcing global patent portfolios. Ms. Cappaert also advises clients on the procedure and strategic use of post-grant proceedings.

Prior to attending law school Ms. Cappaert worked as a mechanical design engineer for Xerox Corporation in Portland, OR in the Xerox Office Group. During her time at Xerox, Ms. Cappaert was responsible for the design and testing of the drum and transfix unit for an A4 solid ink printer. Ms. Cappaert is a named inventor on a U.S. patent directed to creating the proper drum surface topography for solid ink jet printers.


  • American University, Washington College of Law (J.D., cum laude)
  • Massachusetts Institute of Technology (B.S.)
    • Mechanical Engineering


  • Registered to practice before the U.S. Patent and Trademark Office
  • Virginia