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Brian C. Claassen

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 Inter Partes Reviews (IPRs) before the Patent Trial and Appeal Board.  Brian successfully litigates patent disputes for both plaintiffs and defendants.

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 has successfully challenged and defended patents in IPRs, helping to focus disputes for his clients.

Brian is an active leader of the bar. He is a founding member and current Membership Chair of the Howard T. Markey Intellectual Property Inn of Court. He also serves as President for the Federal Bar Association Orange County Chapter and is a group host for ProVisors. Brian also serves as Chair of the firm’s Mentor Committee. 

Prior to joining the firm, Brian developed embedded systems and signal processing devices as a Senior Software and Hardware Engineer at QSC Audio Products.  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., Intellectual Property Summer Institute, Tsinghua University, Beijing, China (2005)
Vanderbilt University, B.E., Electrical Engineering
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 – Eastern District of Texas
U.S. District Court – Northern District of California
U.S. Patent and Trademark Office
Communications Technology

Cellular Networking & Communications

Fiber Optic Networks

Internet Telephony

Low-Power Networks



Wireless Local Area Networks

Consumer Products & Services

Sporting Goods & Recreation

Electrical, Semiconductor & Computer Technology

Electronics & Semiconductors

Healthcare Information Technology

Software & IT


Clean Technology

Energy Conservation

Energy Efficient Technologies

Solar Power

Wind Power

Financial Services & Business Methods

Blockchain & Smart Contracts

Cloud Computing

Cryptocurrency & Encryption

Data Privacy

Dispute Resolution

Licensing & Indemnification

Open Source

Media, Advertising & Entertainment


Digital Distribution

Film & Television

Online Games

Social Media

Video Games and Interactive Entertainment

Medical Devices & Procedures

Ablation Technology

AI & Machine Learning

Cardiac Rhythm Management


Glucose Monitoring & Insulin Infusion


Minimally Invasive & Endoscopic Procedures

Pacemakers & Electrical Stimulation Devices


Sleep Apnea

Sports Medicine

Surgical Equipment



Vital Signs, Physiologic, & Hemodynamic Monitoring

Transportation & Vehicles

Aerospace & Space Technology

Air conditioning / Heating systems

Automotive Transportation & Powersports


Brake Systems

Diagnostic Equipment

Electronics (Audio / Video, Communication, Navigation, Security)


Engines & Engine Components

Fuels & Additives


Passenger Transportation

Personal Motorized Recreation Vehicles (ATVs, Snow Vehicles, Personal Watercraft)


Suspension Components

Tires & Wheels

Tools & Equipment

Transportation Equipment

Antitrust & Competition Litigation
Appellate Litigation
Copyright Litigation
Copyright Litigation
Covered Business Method (CBM)
False Advertising Litigation
False Advertising Litigation
Inter Partes Review (IPR)
IP Strategy
ITC Litigation
Patent Litigation
Patent Trial & Appeal Board (PTAB) Litigation
PostGrant Review (PGR)
Tech Transactions
Trade Secret
Trade Secret & Employee Mobility Litigation
Trade Secret & Employee Mobility Litigation
Trade Secret Protection Advice, Counseling, Employee & Nondisclosure Agreements
Trademark & Brand Protection
Trademark and Brand Protection Litigation
Trademark and Brand Protection Litigation
Trademark Trial & Appeal Board (TTAB) Litigation 
Unfair Competition Litigation
Unfair Competition Litigation

  • Named a “Southern California Rising Star” by Super Lawyers magazine for his work in intellectual property litigation (2014-2018)
  • Howard T. Markey Inn of Court Program of the Year
  • 2017-2018 “Inventorship Mystery Dinner Theater”
  • 2015-2016 “IP Ethics”

Federal Bar Association – Orange County Chapter

President (Present-Nov 2022)

President Elect (2020-2021)

Treasurer (2019-2020)

Secretary (2018-2019)

Board Member (2016-2018)

Howard T. Markey Inn of Court

            Membership Chair (2018-2019)

            Program Chair (2017-2018)  


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