Expert Witness Blog

In Uniloc USA, Inc. v. Microsoft Corp., 632 F.3d 1292 (Fed. Cir. 2011), the Federal Circuit issued a landmark Daubert ruling that fundamentally changed how Computers & Technology Expert Witness damages testimony is evaluated in patent litigation. The decision vacated a $388 million verdict and rejected one of the most widely used royalty-rate methodologies in the technology industry.

Background and Parties

Uniloc USA, Inc. owned U.S. Patent No. 5,490,216, directed to a software-based product activation method designed to deter unauthorized copying. Uniloc sued Microsoft Corporation, alleging that Microsoft’s Product Activation feature in Windows XP and Office product lines infringed the asserted claims. The case proceeded to a jury trial in the District of Rhode Island, where the jury found infringement and awarded Uniloc approximately $388 million in reasonable royalty damages.

In the litigation of Ancho v. Pentek, the role and admissibility of a Conveyors Expert Witness became the central issue, ultimately shaping the outcome of the case. The dispute arose from a workplace injury at the Jefferson Smurfit facility, where the plaintiff, Nathaniel Ancho, alleged that a defective conveyor system caused his harm. Ancho sought to introduce expert testimony to establish that the conveyor system was unreasonably dangerous and that a safer alternative design was feasible.

Background and Parties

Nathaniel Ancho, the plaintiff, brought suit against Pentek, the manufacturer and installer of the conveyor system, after suffering injury allegedly due to a hazardous “pinch point” created by the movement of a transfer car past fixed conveyors. Ancho’s theory of liability rested on the assertion that the conveyor system could have been designed in a safer manner, specifically by replacing the transfer car with a fixed roller conveyor.

In litigation involving complex material failures, the role of the Corrosion Expert Witness is often pivotal in establishing causation, liability, and damages. A recent federal case, Belya et al v. Kapral et al, provides an instructive example of how courts address the admissibility and influence of expert testimony, including that of technical specialists such as corrosion experts, under the Federal Rules of Evidence and Daubert standards.

Case Background and Parties

Belya et al v. Kapral et al arose from a dispute involving allegations of defamation and related claims. The plaintiffs, including Father Alexander Belya, asserted that the defendants made statements implying that Belya had forged certain ecclesiastical documents. The litigation centered on the authenticity of these documents and the reputational harm allegedly suffered by the plaintiffs. Both parties retained multiple expert witnesses to address technical and factual issues at the heart of the dispute, including the examination of document integrity—a field that frequently requires the expertise of metallurgists and corrosion specialists when physical evidence is in question.

In the evolving landscape of consumer credit litigation, the role of the Credit Damage Expert Witness has become increasingly pivotal in quantifying and substantiating claims of reputational and financial harm resulting from inaccurate credit reporting. A notable case exemplifying this trend is Sprague v. Equifax, Inc., where the testimony of a credit damage expert witness was central to the court’s analysis and ultimate resolution of the dispute Sprague v. Equifax, Inc., Cal. Ct. App. 1985.

Background and Parties

The plaintiff, Mr. Sprague, initiated legal action against Equifax, Inc., a prominent credit reporting agency, after suffering significant financial and reputational harm due to the dissemination of erroneous credit information. The dispute arose when Equifax provided a credit report containing inaccurate data to an insurance company, which subsequently influenced the insurer’s decisions regarding the plaintiff’s disability insurance policy. The litigation also involved other parties, including the insurer and a physician, but the focus of the appellate decision centered on Equifax’s conduct and the resulting credit damage.

In litigation involving catastrophic events, the testimony of a Disaster Management Expert Witness can be pivotal in establishing causation, evaluating emergency response, and determining liability. A notable example is found in the case of Tokio Marine & Fire Ins. Co. v. Grove Mfg. Co., 762 F. Supp. 1016 (M.D. Pa. 1991), where the court addressed the admissibility and scope of expert testimony in the aftermath of a disaster.

Case Background and Parties

Tokio Marine & Fire Insurance Company, as subrogee of a party suffering catastrophic property loss, brought suit against Grove Manufacturing Company, alleging that a defective crane manufactured by Grove was the proximate cause of a disastrous incident resulting in significant damage. The litigation centered on whether the crane’s design or maintenance failures led to the disaster, and whether industry standards for disaster prevention and response were met.

A pivotal recent case demonstrates the critical role of an Ergonomics Expert Witness in federal product liability litigation. In Davis v. Sig Sauer, Inc., the United States Court of Appeals for the Sixth Circuit addressed the admissibility and impact of expert testimony concerning the design and safety of consumer firearms, with direct implications for the scope of ergonomics expertise in legal proceedings Davis v. Sig Sauer, Inc., No. 24-5210 (6th Cir. 2025).

Background and Parties

Plaintiff Timothy Davis initiated a products liability action after suffering a gunshot wound to his leg while exiting his truck, caused by the discharge of a Sig Sauer P320 X-Carry pistol. Davis alleged that the firearm was defectively designed, asserting strict liability and negligence under Kentucky law. He argued that the pistol was unreasonably dangerous and that feasible alternative designs could have prevented his injury.

In the high-profile prosecution of Elizabeth Holmes and Ramesh “Sunny” Balwani, the role and admissibility of Fraud Investigation Expert Witness testimony became a focal point in the Ninth Circuit’s review of their convictions for securities fraud and related offenses. The case, stemming from the collapse of Theranos, Inc., addressed not only the substance of the fraud allegations but also the critical evidentiary standards governing expert witness testimony in complex financial trials. The appellate decision is found at USA v. Holmes, No. 23-1167 (9th Cir. 2025).

Background and Parties

Elizabeth Holmes, founder and CEO of Theranos, and Ramesh “Sunny” Balwani, the company’s president, were charged with multiple counts of wire fraud and conspiracy to commit wire fraud. The government alleged that Holmes and Balwani made false statements to investors and patients about the capabilities and reliability of Theranos’s blood-testing technology, resulting in hundreds of millions of dollars in investments and significant public harm.

In recent years, litigation involving funeral home operations and estate administration has increasingly relied on the specialized knowledge of a Funerals & Funeral Homes Expert Witness to clarify industry standards, assess compliance, and evaluate the conduct of funeral service providers. These experts play a pivotal role in cases where the handling of remains, execution of funeral contracts, or adherence to statutory requirements is contested.

A notable example is the case of Johnson v. Mayers, adjudicated by the Supreme Court of Alabama in 2025. This matter arose from the probate of Samuel D. Johnson’s will, which contained specific instructions regarding the disposition of his estate and, by implication, the handling of his funeral arrangements. The parties included Timothy Brian Johnson and Phillip Barnes, nephews of the deceased, who contested the administration of the estate, and Judith Mayers, the sole surviving named beneficiary and appointed administrator. The dispute centered on the interpretation of survivorship language in the will and the application of Alabama’s antilapse statute, with broader implications for the responsibilities of funeral homes in executing testamentary instructionsJohnson v. Mayers, Supreme Court of Alabama 2025.

In this litigation, the Funerals & Funeral Homes Expert Witness was retained to provide authoritative testimony on industry protocols for honoring testamentary directives related to funeral services and the transfer of remains. The expert’s analysis encompassed:

In high-stakes real estate litigation, the testimony of a Hotel Appraisal Expert Witness is often decisive in establishing property value and quantifying damages. The case of Pat Rose Associates v. Coombe, California Court of Appeal 1990 exemplifies the critical role such expert witnesses play in complex hotel valuation disputes.

Pat Rose Associates (PRA), a limited partnership, initiated suit against D. Wesley Coombe and Mervyn G. Flory, key officers of Kingsway Services, Inc., following a series of transactions involving the Sands Hotel in Palm Springs. PRA alleged fraud in the sale of the hotel and breach of a hotel lease, seeking substantial compensatory and punitive damages. The litigation arose after PRA purchased the hotel from Kingsway, only to discover material misrepresentations and failures related to the lease and the hotel’s financial condition.

The factual matrix revolved around the December 1979 acquisition of the Sands Hotel by Kingsway for $3.2 million, financed in part by a promissory note secured by a deed of trust. PRA subsequently acquired the hotel, relying on representations regarding the lease and the property’s value. When the lease terms and the hotel’s financial performance failed to meet expectations, PRA claimed it had been defrauded and suffered significant economic harm.

In Harris v. FedEx Corporate Services, Inc., 92 F.4th 286 (5th Cir. 2024), the Fifth Circuit issued a major Daubert ruling on Human Resources Expert Witness testimony, slashing one of the largest employment-discrimination verdicts in recent history. The case provides authoritative guidance on the boundaries of admissible HR expert opinion in Title VII litigation.

Background and Parties

Plaintiff Jennifer Harris, a Black sales executive, brought claims of race discrimination and retaliation against FedEx Corporate Services under Title VII. Harris alleged that FedEx subjected her to a hostile work environment, denied her promotion opportunities, and ultimately retaliated against her for raising discrimination concerns. After trial in the Southern District of Texas, the jury returned a verdict awarding Harris approximately $366 million in damages.