Intellectual Property Archives – Page 3 of 3

Julie Knox

Julie Knox is a forensic accountant and commercial damages consultant with more than 25 years of experience. She has been appointed as an expert on numerous occasions.

Julie has testified in cases before the United States Federal Court, California Superior Court and in domestic and international arbitrations. She has acted as an expert for disputes regarding commercial damages and valuation, intellectual property, and forensic accounting and investigations across financial, technology, sports and entertainment, and industrial sectors.

Julie has consulted on financial reporting matters and business operations and has conducted financial statement audits of companies and government agencies. She has performed forensic accounting analysis, funds tracing, and financial reporting analysis on behalf of companies, boards of directors, and special committees.

Julie provides analysis and expert opinion regarding lost profits, unjust enrichment, reasonable royalties, and restitution resulting from breach of contract, breach of fiduciary duty, anti-trust, unfair competition, intellectual property infringement, trade secret misappropriation, and other allegations.

Julie is a Chartered Financial Analyst, a Certified Public Accountant (California and Virginia) and is Certified in Financial Forensics. She has presented to the AICPA, CalCPA, various university groups and law firms addressing accounting and economic damages issues, intellectual property valuation and damages, and ITC section 337 investigations.

John L Hansen

John L Hansen is a Certified Public Accountant with more than 35 years of experience. He has been appointed as an expert on hundreds of occasions.

John Hansen is a standout expert with sharp analytical skills and a wealth of experience in IP litigation. He regularly acts as an expert witness in IP infringement disputes and advises clients on the licensing of IP, solidifying his reputation as a leading authority in the field.

Lexology Index – IP

John has testified as an expert on damages and economic issues in trial and arbitration, state courts, federal courts, and before the International Trade Commission. He has presented declarations and deposition testimony before the Patent Trial and Appeal Board and participated in settlement negotiations and mediations for disputed values in excess of $1 billion.

John is an experienced consultant who supports companies on economic, accounting, and damages matters in a wide variety of industries, from entertainment and sports to technology, software, and consumer products. He has analysed and addressed lost profits, price erosion, reasonable royalties, unjust enrichment, increased costs, and diminution of asset and business value. John’s experience spans intellectual property, commercial damages, class action, forensic accounting, and valuation matters.

John specialises in evaluating the financial impact of alleged intellectual property infringement and misappropriation, including patents, trademarks, copyrights, and trade secrets. He has assisted clients with Section 337 investigations before the United States International Trade Commission, addressing domestic industry and remedy issues. He has also consulted on the valuation and licensing of intellectual property.

John has extensive experience in class action matters, including assessing issues related to class certification and evaluating class-wide damages models. He has created databases to evaluate risk exposure and identify potential class members, dissimilarities among potential class members and evaluation of class representatives. John has determined whether damages may be calculated on a class-wide basis and evaluated potential class damages, including economic offsets to potential damages.

John has been recognized as a leading expert witness in intellectual property disputes in the United States in the IAM Patent 1000 since 2018 and was recognized as a Top 25 Patent Damages Expert in 2026 by the CPVA designation. He is a Certified Licensing Professional, a Chartered Global Management Accountant, and is Certified in Financial Forensics by the American Institute of Certified Public Accountants (AICPA). John has presented on financial, accounting and damages issues, along with intellectual property valuation and licensing, to university and industry groups such as the Licensing Executives Society, the University of California College of the Law, San Francisco, Stanford University, and Santa Clara University, and the USC Gould School of Law Intellectual Property Institute.

Alex Menenberg

Alex Menenberg has 15 years of experience in forensic accounting and commercial damages and has been appointed as an expert on multiple occasions.

He has testified in arbitration and deposition and submitted expert reports in Federal Court, as well as for matters outside of litigation, including confidential investigations and pre-litigation disputes. His consulting work spans a variety of financial, economic, and accounting-related issues arising out of business disputes and civil litigation.

His experience includes conducting funds tracing and performing analyses related to financial fraud allegations. He has worked with Fortune 100 corporations across industries such as entertainment, financial services, real estate, insurance, consumer electronics, energy, and construction.

Alex has assessed damages related to breach of contract, lost profits, lost wages, intellectual property infringement, increased costs, and theft of trade secrets. He also brings broad experience working with large datasets and is adept at designing, constructing, and analysing large databases to create complex and dynamic financial models.

His labour and employment experience includes analysing wage and hour claims, employee misclassification, and meal break deductions, as well as evaluating damages in wrongful termination, commission disputes, and duty of loyalty matters. He has worked extensively with employment-related data sources, including delivery route logs, scanning data, and timekeeping systems.

Alex is a Certified Public Accountant, Accredited in Business Valuation, and a Certified Fraud Examiner with a degree in economics from Pomona College. His speaking engagements have covered topics including economic consulting, managing complex transactions, and insolvency damages. He serves on the planning committee of the USC Intellectual Property Institute and on the board of directors of Bet Tzedek Legal Services.

David Duffus

David Duffus is a forensic accountant with more than 25 years of experience across multiple industries. He has been retained as an expert on more than 100 occasions.

David Duffus stands out for his extensive experience in litigation support, with a career spanning over three decades. He has worked on high-stakes, multimillion-dollar cases involving IP, breach of contract and stakeholder disputes, providing expert testimony in state and federal courts.

Lexology Index – Commercial Litigation

David has testified as an expert at deposition, trial and in alternative dispute settings more than 90 times. He has acted as an expert for disputed values of up to $275 million and for project values in excess of $300 million. He has also served as an arbitrator or neutral accountant in post-acquisition and valuation-related disputes.

Since 1992, David has specialized in working on complex litigation services, forensic accounting and valuation services assignments for businesses ranging from start-up entities to Fortune 100 companies. He has worked extensively with counsel through all phases of the litigation process and has provided expert witness and deposition testimony in matters in state and federal court, and in alternative dispute settings. Prior to joining HKA, David spent almost 17 years, including the last 15 as a partner, in Baker Tilly’s Global Forensics & Litigation Services practice.

Over the course of his career, David has developed significant experience working with clients to quantify damages in complex commercial disputes, including matters involving claims of intellectual property infringement, breach of contract, tortious interference, product liability, fraud, and breaches of restrictive covenants. He is also frequently called upon to value businesses and related ownership interests in stakeholder disputes, post-acquisition disputes and bankruptcy matters. Beyond his damages and valuation work, David has conducted forensic accounting analyses in connection with financial reporting issues, internal investigations surrounding employee misconduct, stakeholder disputes and project failures.

David is a certified public accountant (CPA) licensed in Pennsylvania and a member of the American Institute of Certified Public Accountants (AICPA) and the Turnaround Management Association. He acts as an instructor for the AICPA expert witness training programme and is certified in financial forensics (CFF), a certified fraud examiner (CFE), accredited in business valuation (ABV) and holds a master’s in accounting and finance and a degree in economics and political science.

David Duffus is praised as “a master of future lost profits analysis,” underscoring his reputation as a leading expert in the quantification of damages. He is further praised for his “thoughtful analysis and ability to evaluate and present alternatives”.

Lexology Index – Consulting – Financial Advisory and Valuation – Quantum of Damages

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