Knobbe/Martens: Intellectual Property Law
Brian C. Claassen

Brian C. Claassen


At a Glance

  • J.D. University of Notre Dame Law School
  • B.E. Electrical Engineering, Vanderbilt University

  • State Bar of California
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. District Court - Central District of California
  • U.S. District Court - Northern District of California
  • U.S. District Court - Eastern District of Texas
  • U.S. Patent and Trademark Office

Professional Profile 

Brian leverages his deep technical aptitude and legal experience to successfully resolve his clients’ high stakes technology disputes.  Brian strategically guides clients through all stages of litigation in federal courts throughout the country, the International Trade Commission, and the Patent Trial and Appeal Board.  His litigation practice emphasizes electrical engineering patent litigation, but also includes trade secrets, trade dress, trademarks, and copyrights.  Brian also counsels clients regarding intellectual property licenses, open source software issues, and domain name disputes.

Brian obtains favorable results for plaintiffs and defendants, including negotiating early settlements, arguing motions, prevailing on motions for summary judgment, and conducting jury trials.  He has significant experience defending against allegations of patent infringement by non-practicing entities in some of the busiest judicial districts in the United States.

Brian is an active leader of the bar.  He is a founding member and current Program Chair of the Howard T. Markey Intellectual Property Inn of Court.  He also serves on the Board of Directors for the Federal Bar Association Orange County Chapter and is a group host for ProVisors.  In 2011, Mr. Claassen was selected to conduct multiple jury trials, motions, and felony preliminary hearings as first chair trial attorney with the Orange County District Attorney's Trial Attorney Partnership program.

Prior to joining the firm, Brian developed embedded systems and signal processing devices as a Senior Software and Hardware Engineer at QSC Audio Products, Inc.  Brian’s technical experience in electronic product design, including digital and analog hardware, signal processing, firmware and software development, help him immediately understand his clients’ most complex technical issues.


  • University of Notre Dame Law School (J.D. 2007), Intellectual Property Summer Institute, Tsinghua University, Beijing, China (2005)
  • Vanderbilt University (B.E. Electrical Engineering 1998)
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