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Expert Witness Expert Testimony

McGuireWoods LLP

Perfecting Expert Testimony at PTAB

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Expert testimony plays a critical role in Patent Trial and Appeal Board (PTAB) proceedings at the U.S. Patent and Trademark Office (USPTO). Thousands of petitions for inter partes review (IPR) and post grant review have been...more

Holland & Knight LLP

Podcast - Expert Witnesses, Special Issues

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In this episode of "The Trial Lawyer's Handbook" podcast series, litigation attorney Dan Small discusses the challenges and strategies associated with using expert witnesses in trials. He advises against agreeing to stipulate...more

Pullman & Comley - For What It May Be Worth

AI In Real Estate Appraisal: Legal Skepticism, Industry Adoption, And An In-House Experiment On Its Accuracy

As the capabilities of artificial intelligence (AI) rapidly change, the laws regarding AI use likewise adapt. For instance, the New York Surrogate’s Court recently grappled with an expert witness’ use of AI to support his...more

Holland & Knight LLP

Podcast - Direct Examination of Expert Witnesses

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In this episode of his "The Trial Lawyer's Handbook" podcast series, litigation attorney Dan Small reviews how the effectiveness of expert witness testimony can influence case outcomes. He outlines four critical components...more

Zelle  LLP

Federal District Court Holds Engineer Is Qualified Enough, and His Methods Are Reliable Enough, to Testify to Date Wind and Hail...

Zelle LLP on

In Wings Platinum, LLC v. Westchester Surplus Lines Ins. Co., No. 3:23-CV-2145-D, 2025 WL 391388 (N.D. Tex. Feb. 4, 2025), a federal district court recently held that an engineer with one year and one month of experience...more

Purpose Legal

The Role of Digital Forensics Expert Witnesses

Purpose Legal on

In the digital age, the courtroom has evolved. It’s no longer just about physical evidence and eyewitness accounts. Today, digital evidence plays a crucial role in many legal proceedings. Enter the digital forensics expert...more

Greenbaum, Rowe, Smith & Davis LLP

New Jersey Supreme Court Opinion Refines Affidavit of Merit Requirements for Malpractice Case Against Physician Certified in...

In another in the seemingly endless series of decisions parsing the interpretation of the statutory requirements for an affidavit of merit in medical liability claims, on January 22, 2025 the New Jersey Supreme Court issued...more

Faegre Drinker Biddle & Reath LLP

Foundation, Not Façade — The Fifth Circuit Affirms the Proper Basis Requirement for Admissibility of Expert Opinions in Newsome v....

In a toxic tort case, plaintiffs must establish general causation. If a substance is incapable of causing the type of injury plaintiff claims, then it certainly didn’t cause theirs. Under Texas law, toxic tort plaintiffs must...more

Faegre Drinker Biddle & Reath LLP

To Depose or Not to Depose: When Challenging Opposing Nonretained Experts Becomes Challenging

Federal Rule of Civil Procedure 26(a)(2) requires parties to disclose the opinions of experts who may present evidence at trial. If the disclosures are inadequate, Rule 37(c) requires exclusion of the opinions “unless the...more

Marshall Dennehey

Supreme Court of New York, Appellate Division Reversed Jury Verdict to Dismiss Complaint, Finding the Supreme Court Exercised...

Marshall Dennehey on

Deliz v. Julia Rose Transport, --- N.Y.S.3d --- (N.Y. App. Div. 2d Dept. 2024) - In Deliz, the plaintiff presented an expert witness to testify that the most likely cause of the motor vehicle accident was that the defendant...more

BakerHostetler

The Difference Between Theory and Practice: Lighting Defense Group LLC v. Shanghai Sansi Electronic Engineering Company Ltd., et...

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You can’t make applesauce out of oranges — and experts may not cook up opinions with contrary facts. In Lighting Defense, the patent damages expert opined that in a “hypothetical negotiation,” the parties would have agreed to...more

Dickinson Wright

Can an Expert Define and Determine What Constitutes Discrimination?

Dickinson Wright on

In employment discrimination cases, the parties often retain experts to opine about various aspects of the case. An expert may provide, for example, insight as to job performance issues or, in many instances, determine the...more

Faegre Drinker Biddle & Reath LLP

Plaintiff’s Half-Baked Attempt to Prove Defect and Causation With Photographs of Moldy Bread Shows the Knead for Expert Testimony

A picture may be worth a thousand words, but that doesn’t make the camera an expert witness. Product liability actions usually require expert testimony to prove defect and causation. Pictures, like other documents, can be...more

McGuireWoods LLP

Northern District of Indiana Excludes Battery Expert Opinions Based on Flawed Methods

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On Sept. 30, 2024, the U.S. District Court for the Northern District of Indiana released an opinion and order excluding the opinions of a proposed lithium-ion battery expert. The now dismissed case, American Home Assurance...more

U.S. Legal Support

Fact Witness vs. Expert Witness: Key Preparation Tactics

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As it pertains to building a solid case, persuading jurors, and securing the best chances of a favorable outcome, witnesses can make or break your trial. It’s essential to utilize key witnesses to their full potential during...more

Farrell Fritz, P.C.

Court Permits Expert Reports with Disclosure Gaps but Recognizes Limits on Trial Testimony

Farrell Fritz, P.C. on

My colleague Matt Donovan recently wrote about the requirements of Commercial Division Rule 13(c) and highlighted certain decisions in which expert reports were precluded for non-compliance. This week’s post looks at a...more

U.S. Legal Support

Best Practices for Preparing an Expert Witness for Deposition

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As a trial attorney, you’ll often enlist expert witnesses to evaluate claims, clarify complex evidence, write an expert witness report, and offer authoritative opinions. Because time and money can be tight during trial prep,...more

IMS Legal Strategies

5 Tips for Med Mal Expert Testimony from a Hot Seat Veteran

IMS Legal Strategies on

As a presentation technology consultant, I have been sitting in the hot seat for almost 25 years. I average one trial a month with about 75% being medical malpractice (med mal) cases. I work with both plaintiff and defense...more

WilmerHale

Federal Circuit Patent Watch: An Expert Need Not Have Acquired the Requisite Skill Level Prior to the Time of the Invention

WilmerHale on

Precedential and Key Federal Circuit Opinions - WISCONSIN ALUMNI RESEARCH FOUNDATION v. APPLE INC. [OPINION] (2022-1884, 8/28/2024) (Prost, Taranto, and Chen) - Prost, J. The Court affirmed two final judgments of the...more

Miles Mediation & Arbitration

Litigating Healthcare Malpractice Cases: Challenges for Plaintiff’s and Defense Counsel

Even if they involve similar facts or injuries, no two medical malpractice cases are alike. Juries are laypeople who must consider testimony from medical experts and other witnesses and determine credibility and competence....more

Fox Rothschild LLP

No, Courts Cannot Just Adopt A Court Appointed Expert’s Opinion Without a Cross Examination

Fox Rothschild LLP on

The Rules of Court clearly allow a Family Part Judge to appoint their own expert on any issues, whether custody or economic issues, in order to aid the court in making a decision on an issue before the Court. The Court rule...more

Cooley LLP

A Sword and A Shield: How SCOTUS Expert Testimony Rulings May Benefit Corporate Defendants

Cooley LLP on

The US Supreme Court decided several criminal procedure cases during the 2023 – 2024 term – including Diaz v. United States, 144 S. Ct. 1727 (2024) and Smith v. Arizona, 144 S. Ct. 1785 (2024) – which have relevance and...more

Baker Botts L.L.P.

Intellectual Property Report - August 2024

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Be an Expert: Precedential PTAB Decision on Conclusory Expert TestimonyStutti TilwaA recent precedential decision from the Patent Trial and Appeal Board (“PTAB”) may serve as a warning for those parties who plan on relying on...more

Baker Botts L.L.P.

Be an Expert: Precedential PTAB Decision on Conclusory Expert Testimony

Baker Botts L.L.P. on

A recent precedential decision from the Patent Trial and Appeal Board (“PTAB”) may serve as a warning for those parties who plan on relying on expert declarations in their inter partes reviews (“IPR”). On August 24, 2022, the...more

Farella Braun + Martel LLP

What Have We Learned From the First Six Months Under the New Federal Rule of Evidence 702?

As patent practitioners know, Daubert motions can be some of the most hotly contested and pivotal motions in the life of a patent case. These motions are used to exclude testimony from an opponent's expert witness, usually on...more

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