Trademark Expert Witnesses

trademark expert testimony

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Trademark expert witness candidates typically have extensive experience and expertise in market research, trademark surveys, trademark infringement damages, and intellectual property law. In a high-profile case, or litigation involving a significant financial stake, a law firm may require a testifying expert with prior expert witness testimony experience.

An intellectual property protection program stops others from using intellectual property (trademarks, patents, copyrights) without a licensing agreement. Trademark infringement is the unauthorized use (no licensing agreement) of a trademark or service mark that causes confusion or deception. Trademark law allows action in a state or federal court to request monetary relief or a court order (injunction) to stop use of the accused mark. Litigation support by a trademark expert witness could include research, a confusion survey, an expert report, expert opinion, expert testimony and/or courtroom testimony. An economist specializing in economic damages for trademark infringement may be called upon to provide valuation calculations. In addition, a law firm may request a trademark or marketing expert for pre-litigation consulting work.

Representing either the plaintiff or defendant, Cahn Litigation Services is the service provider of choice to locate expert witnesses that can support a trademark infringement case. Examples trademark issues for which Cahn Litigation Services locates intellectual property expert witnesses include trademark infringement, trademark abandonment, secondary meaning, deceptive advertising, false advertising, copyright infringement, unfair competition, brand valuation, likelihood of confusion surveys, and trade dress infringement.

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Trademark Expert Witness - Representative Bios

Please Note: All Cahn Litigation expert witness searches are customized to attorneys' precise specifications and preferences. Attorneys are encouraged to discuss search parameters with a Cahn search specialist.

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The below expert witness bios represent a small fraction of those Trademark experts known by Cahn Litigation Services. These bios are provided to give lawyers a sense of the Trademark landscape.

Expert Witness #249843

This expert has many years of branding industry expertise in developing brand names, brand imagery, brand messaging, package design, advertising and communications for the market-leading, global brands of more than 50 Fortune 500 consumer product and service companies. This gives this expert a unique insight in establishing the likelihood of consumer confusion between brands and how that influences purchase behavior. Specializing in trademark infringement and the likelihood of consumer confusion, this expert has served as the principal of one of the nation's most respected brand identity and design consultancies. There, this expert developed branding for more than 50 consumer product companies. This expert has designed and analyzed more than 1,000 consumer research surveys, and thus, has market-proven knowledge of what generates consumer awareness/perception and what generates secondary meaning for "famous" marks. This expert has served as an expert witness in the jewelry category, including a trademark infringement based on a jewelry design.

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Expert Witness #253230

Director of a nationally recognized consultancy specializing in Business Consulting and Accounting, this expert brings to the table many years of experience in forensic accounting/investigation, economic damages, insurance and litigation support services, as well as business valuations. This expert also has a long history of consulting on insurance damage claims including limited partnerships, intellectual property, trademark valuation, and shareholder and partner disputes. This expert's practice spans various service segments in regions throughout the United States. This expert has consulted on thousands of economic damages, construction delay, lost income, bodily injury, wrongful death, employee dishonesty, construction, and other insurance claims exceeding hundreds of millions of dollars in the United States and abroad. This expert also has prepared numerous business valuations of privately held companies as a whole and as partial interests. This expert's expertise also includes forensic accounting, fraud investigation, and litigation support services including assistance in case analysis, preparation for trial, and expert witness testimony.

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Expert Witness #256205

For many years this expert has taught courses in patent law, trademark law, copyright law, international IP law, IP survey, and IP theory. This expert is a prominent law professor who is considered one of the nation's preeminent experts on intellectual property and technology law. This expert consults with some of the world's leading companies and serves as an expert witness in trademark and IP cases. This expert has fielded confusion research pursuant to the Lanham Act within the following industries:

  • Virtual Meeting Software
  • Off Road Utility Vehicles
  • Production Equipment Manufacturer
  • Thermo-Insulated Beverage Tumblers
  • Vinyl Automotive Wraps
  • Outdoor Sport-Oriented Cameras

This expert has a joint appointment between the School of Law and the School of Business. This joint appointment will allow students to take classes that integrate legal and business principles.

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Expert Witness #258706

This expert works at an intellectual asset consulting firm specializing in trademark, patent and copyright monetization, valuations, and expert testimony. This expert has been involved the Licensing Industry Merchandisers' Association. This expert served as an active member of the International Licensing Executives Society.

A seasoned consumer goods marketer, after receiving an MBA, this expert served a stint with a management consulting firm. Subsequently, this expert was the youngest Vice-President and corporate officer at a company where this expert launched many licensing programs. This expert has led the way in developing and establishing accepted methods to value brands, technologies and other IP. This expert is an expert in building and licensing brands, as well as developing and managing licensing programs for all IP.

Not only a branding and licensing expert, this expert is also an acknowledged pioneer in developing the methodologies that enable accurate valuation of IP on a worldwide basis. This expert's multiple books on the subject have been published in the U.S. as well as in Europe and China.

This expert has developed numerous monetization strategies for major corporations and has performed valuations of hundreds of intellectual property components.

This expert is a world-renowned IP expert with testifying experience in state, federal, tax, bankruptcy and international arbitration courts. In trial testimony, multiple depositions, and numerous Rule 26 reports, this expert's expertise has been established and reaffirmed.

This expert continues a leading role in the world of IP, and in the changing environment of publicity valuation and development, patents, trademarks, copyrights. As an Adjunct Professor of Intellectual Property Law, this expert teaches both IP licensing and valuation - based partially on CLEs developed for international law firms, bar associations, as well as a foreign Supreme Court.

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Expert Witness #261848

This expert received a B.A. in History and graduated with honors and with distinction. This expert later received a J.D. This expert was a Trademark Examining Attorney at the U.S. Patent and Trademark Office. This expert is a member of AIPLA and INTA.

This expert specializes in U.S. and foreign trademark prosecution and clearance. This expert is experienced in oppositions and cancellations before the Trademark Trial and Appeal Board, as well as in federal trademark litigation matters. This expert is also experienced in the copyright registration, enforcement and counseling fields. This expert also has significant knowledge with respect to the rapidly expanding and changing domain name laws, as well as the important legal interplay between domain names and trademarks.

This expert is a partner at a law firm and heads the firm's trademark practice, and has been in private practice for many years. This expert has litigated many trademark cases.

This expert's experience allowed this expert to gain an understanding not only as to damages calculations for infringement matters, but also, what would be considered reasonable fees for trademark matters.

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Expert Witness #217512

This expert heads an internationally recognized consultancy providing Expert Witness Services to law firms involved in litigation related to SEO (Search Engine Optimization) technology or business. This expert has been working in the areas of computing, Software development, Cyberspace, Internet/Ecommerce, SEO, and PPC.


Internet Technology

Ecommerce & Conversions

Online Marketing

Search Engine Optimization (SEO)

Social Networking

Online Advertising/Pay Per Click

Web Development


Internet-Technology Patents, Inter Partes Re-exams, CBM/Post-Grant Challenges


Ecommerce-related Unfair Business Practices

Domain Names

Online Defamation/Online Libel

Internet Fraud


Founder of an eBusiness Service Provider

Founder of an Internet-enabled publishing firm

VP of Web Solutions for a national ISP

VP of Marketing for a Web-applications company

ecommerce consultant, VP of Business & Corp. Development for e-commerce startup

Extensive authorship related to Internet, technology

working in all areas of online business


Dozens of Internet & Technology books

Hundreds of Internet & Technology newspaper & magazine articles

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Expert Witness #218653

This expert is an experienced forensic marketing litigation expert. This expert has provided litigation support for a wide range of litigation issues in the areas of Trademark, Trade Dress, advertising, marketing, sales, intellectual property and brand management. This expert has been retained by ~100 law firms as an expert witness, furnished 50+ Lanham Act Surveys and nearly 20 Rebuttals to Surveys.  This includes consumer confusion, brand awareness, descriptiveness and genericness, trademark infringement, and dilution. This expert is experienced in the areas of consumer opinions, consumer behavior, strategic planning, finance, interactive, social media, purchasing process, brand marketing, creative services, promotion, advertising, sales, retail, and product management.

Given this expert’s extensive trademark and survey experience, in addition to this expert’s testimony, this expert has been personally responsible for more than fifty registered trademarks and has been fully responsible for a research-based consulting firm and two Fortune 500 research organizations. This expert received an MBA and has many years of experience in brand, management, research and strategy, and forensic marketing.

Early in this expert’s career, this expert spent time working in the areas of national brand management and promotional marketing. Once a Chief Marketing Officer for a major retail chain, this expert owned and managed a strategic marketing consultancy where this expert worked directly with senior executives of many Fortune 500 corporations and has consulted the legal profession on numerous trade dress and consumer behavior issues. This expert has been retained by many reputable firms to conduct research for trademark disputes and provide expert testimony.

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Expert Witness #252454

This expert is President of a highly sought-after search engine marketing consultancy and has an extensive background in search engine optimization and online marketing. In addition to agency work, this expert provides subject matter expertise for litigation, specializing in online trademark infringement.

This expert has worked for some of the top agencies in the SEO industry, researching and developing search optimization and providing search marketing strategies for Fortune 500 and Internet Retailer 500 companies.

This expert has provided qualified expert witness services in PPC trademark cases. This expert has lengthy experience in programming online ad delivery technology, managing PPC ad campaigns, and thoroughly checking for possible fraudulent activities. This expert has been effective in understanding and explaining the possible sources of misimpressions that can directly affect the potential damages in lawsuits involving online trademark infringement.   This expert has experience setting up “corrective advertising” campaigns to repair or reeducate the public about the proper association between a mark and the company it represents. This expert is:

Thoroughly knowledgeable about Google Ads (formerly Google AdWords) that match keywords and keyword phrases, and interpreting whether the defendant complied with contractual agreements to limit the display of their ads for words/phrases defined by their competitor

Experienced at explaining the meaning of industry jargon

Highly qualified to explain the complexities of Google Ad’s matching systems and the potential for unintended matching

This expert has created and run PPC ad campaigns for many years and participated in numerous lectures on Google ad management methodologies. This expert has written articles on aspects of Google ads as well as spoken at conferences on Google advertising topics. This expert can intelligently and logically explain how Google advertising functions, in addition to broader questions involving the search results, bidding and ranking of the PPC ads, and Google systems to attempt to limit some trademark infringement and their ad copy display rules.

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Expert Witness #223492

This expert has devoted efforts to litigation-related survey research and to marketing and business strategy consulting for established high-tech companies and startups. After receiving a PhD in marketing based on original research in brand loyalty, this expert taught for many years in graduate business programs as a full-time faculty member. During this expert’s research career, this expert has conducted, designed, directed, and reported on thousands of studies. A leading consumer research and survey expert with a career dedicated to advancing the science of consumer behavior, this expert is widely published in the leading industry journals on marketing research. This expert has played pivotal roles in many types of commercial litigation, addressing issues as varied as brand strategies, trademark infringement and reasonable royalties, including providing deposition and trial testimony.

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Expert Witness #265412

This expert is a founding principal of a consulting firm providing consulting, valuations and testimony regarding IP damages and licensing custom and practices. This expert focuses on copyright, trade dress, trade secrets and trademark infringement, publicity rights, social media and Internet infringement, defamation, marketing strategy analyses, royalty rate determinations and other intangible assets. This expert also provides valuation and monetization strategies for trademarks, trade secrets, publicity rights, domain names, Internet and social media assets, brands, copyrights and other intangible assets for financial reporting, bankruptcy and transactional due diligence. This expert is affiliated or associated with the major industry associations in licensing and in intellectual property and has been a frequent presenter at industry conferences. This expert has deep experience as an expert witness, having been the named testifying expert in over 75 cases, with over 20 depositions and five trials.

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Expert Witness #266222

This expert is a Senior Director at a large intellectual property equity firm. This expert’s specific advantage comes from having earned both an MBA in finance as well as a JD, cum laude. This expert has deep experience in valuing intellectual property, and in calculating damages from claims of infringement, breach of contract and is well versed in the proper methods of calculation, royalty rates, and in all aspects of damages assessment. This expert has particular experience in clothing and apparel industry matters and has been engaged for patent, trademark, copyright, trade secret and other intellectual property matters and has served as an expert witness.

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