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Brian Christopher Claassen

Patent infringement Attorney at Irvine, CA

Not yet reviewed
  • Licensed for 16 years
    State CA
    Acquired 2007
    Active No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Brian

Learn Brian’s areas of practice.

Practice areas
  1. Patent infringement

    16 years, 30 cases

  2. Copyright infringement

    16 years, 30 cases

  3. Trademark infringement

    16 years, 30 cases

Brian Claassen is a partner in Knobbe Martens’ Orange County, California office. His practice emphasizes electrical engineering patent litigation. He also represents clients in other intellectual property matters including those involving patents, trademarks, trade secrets, trade dress and copyrights. Mr. Claassen is immersed in all stages of high stakes litigation in federal courts throughout the country and before the International Trade Commission. He has obtained favorable results for plaintiffs and successfully defended clients against infringement allegations, including negotiating early settlement, arguing motions, prevailing on motions for summary judgment, and conducting jury trials. Mr. Claassen is also a registered patent attorney. He has prepared and prosecuted patent applications in a variety of technologies, including electronics, computer software, medical devices, unmanned aerial vehicles, game controllers, ophthalmic devices and methods, and surf craft. Mr. Claassen also counsels clients regarding intellectual property licenses, open source software issues, and domain name disputes. 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, Mr. Claassen developed embedded systems and signal processing devices as a Senior Software and Hardware Engineer at QSC Audio Products, Inc. Mr. Claassen worked as a summer associate with the firm in 2006. He joined the firm in 2007 and became a partner in 2013.


Knobbe Martens Olson & Bear
2040 Main St 14th FL
Irvine, CA, 92614-7216

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AVVO RATING 8.0 (Excellent)

Work Experience

  • Senior Software and Hardware Engineer
  • QSC Audio Products
  • 1998 - 2004


  • Notre Dame Law School
  • JD - Juris Doctor
  • 2007
  • Vanderbilt University
  • B.E.
  • 1998

Sample of Legal Cases

  • Kreative Power v. Monoprice
  • Summary Judgment
  • Masimo Corp. and Cercacor v. Dominion Assets
  • Dismissed
  • Canatelo, LLC v. Toshiba America
  • Dismissed


  • Howard T. Markey Intellectual Property American Inn of Court
  • Associate
  • 2014 - Present
  • ProVisors
  • Host
  • 2014 - Present
  • State Bar of California
  • Member
  • N/A

Languages Spoken

  • English

Honors and Awards

  • Rising Star
  • SuperLawyers
  • 2014

Speaking Engagements

  • Research Week
  • Intellectual Property Basics
  • 2013

Attorney endorsements

Received (2)
Given (0)
Endorse Brian
Litigation Attorney | Aug 07
Relationship: Fellow lawyer in community
"I've referred several clients to Brian over the years, and they've always been very happy with the advice Brian has given. If Brian could help, he did. If he felt the client was better served by someone else, he would help the client find the right fit. I endorse Brian whole-heartedly on his work in intellectual property."
Copyright infringement Attorney | Jun 17
Relationship: Fellow lawyer in community
"I endorse this excellent lawyer."
This attorney hasn't created any attorney endorsements recently on Avvo.

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Irvine Patent infringement Lawyer Brian Christopher Claassen
Brian Christopher Claassen
Patent infringement Attorney
Irvine, CA
Licensed for 16 years