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Expert Testimony Evidence Appeals

McDermott Will & Schulte

Dim damages methods can doom bright ideas

In a mixed ruling on evidentiary exclusions and damages methodology, the US Court of Appeals for the Federal Circuit affirmed in part, reversed in part, vacated in part, and remanded a district court’s decision that excluded...more

Faegre Drinker Biddle & Reath LLP

Double Take: Fifth Circuit’s Dual BELO Rulings Show Both General and Specific Causation Are Essential

We previously blogged about a decision in the In re Deepwater Horizon BELO litigation – Ruffin v. BP Exploration & Production, Inc. – in which the Fifth Circuit affirmed summary judgment for defendants in an alleged chemical...more

A&O Shearman

Evidence Exclusion And Daubert Motion Denials Must Be Supported By Valid Legal Rule And Reasoning; Damage Calculation Must Account...

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In Jiaxing Super Lighting Elec. Appliance, Co. v. CH Lighting Tech. Co., Ltd, the Court of Appeals for the Federal Circuit reviewed the judgment in a patent infringement case involving three patents owned by Jiaxing Super...more

Proskauer - The Patent Playbook

Federal Circuit Vacates $300 Million Verdict Against Apple, Orders Third Trial in LTE Patent Dispute

In a pivotal ruling for patent damages and standard-essential patent (SEP) litigation, the Federal Circuit vacated a $300 million award against Apple in a long-standing dispute with Optis Cellular Technology, LLC. See Optis...more

Irwin IP LLP

Unreliable Expert Testimony Shall Not Pass 

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On May 21, 2025, the Federal Circuit en banc banished the notion that the reliability of an expert’s methodology under Federal Rule of Evidence 702 (“Rule 702”) is a question of weight, not admissibility. The en banc Court...more

Venable LLP

Federal Circuit Issues Rare En Banc Decision on Patent Damages

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In the first en banc decision for a utility patent case since 2018, the Federal Circuit reversed a district court's denial of a new trial on damages in EcoFactor, Inc. v. Google LLC and held that EcoFactor's damages expert's...more

Faegre Drinker Biddle & Reath LLP

Fifth Circuit Clouds Threshold Dose Analysis in Ruffin v. BP

Plaintiffs in toxic tort cases must prove both general and specific causation, generally through the testimony of experts. Experts must establish that a specific chemical exposure can (and did) cause the specific injury at...more

McDermott Will & Schulte

En Banc Federal Circuit Cools Damages Award Because of Improper Expert Testimony

In an en banc decision in EcoFactor, Inc. v. Google LLC, the US Court of Appeals for the Federal Circuit concluded that the district court abused its discretion by admitting testimony from a damages expert that a lump-sum...more

Fitch, Even, Tabin & Flannery LLP

Federal Circuit Emphasizes Gatekeeper Role of Court in Damages Expert Evidence

On May 21, in EcoFactor, Inc. v. Google LLC, the Federal Circuit issued an en banc ruling in which the court remanded the case for a new trial on damages. In so doing, the Federal Circuit emphasized the role of the court in...more

Proskauer - The Patent Playbook

EcoFactor v. Google: The Federal Circuit Clarifies Damages Expert Admissibility

Admissibility standards for patent damages experts has come under scrutiny. Previously, we highlighted the EcoFactor v. Google case regarding Google’s petition for rehearing en banc to address the admissibility of EcoFactor’s...more

BakerHostetler

Gatekeeping Reasserted: The Federal Circuit’s En Banc Ruling in EcoFactor v. Google

BakerHostetler on

The Federal Circuit issued its long-awaited en banc opinion in EcoFactor v. Google, which provides further clarity on the admissibility standards for damages experts under Rule 702. This decision reverses the original panel’s...more

Tyson & Mendes LLP

Taming the Wolf: Florida’s Fifth DCA Holds the Line on Tort Reform

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The Florida Fifth District Court of Appeal recently issued a significant decision in Wolf v. Williams, clarifying that a critical aspect of Florida’s momentous tort reform effort, Section 768.0427, is not retroactive. This...more

Vorys, Sater, Seymour and Pease LLP

The Precedent: The Federal Circuit Remands and Reassigns District Court Patent Infringement Case to a New Judge

In this edition of The Precedent, we outline the decision in Trudell Medical International Inc. v. D R Burton Healthcare LLC. The U.S. Court of Appeals for the Federal Circuit recently affirmed in part, reversed in part and...more

Husch Blackwell LLP

Texas Court Upholds Summary Judgment in Silica Case

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The Texas Fourteenth Court of Appeals upheld summary judgment for Exxon Mobil corporation in Stanley Cole v. Exxon Mobil Corp. (No. 14-22-00756-CV), a premises liability case involving alleged exposure to olivine dust. The...more

Baker Botts L.L.P.

The Federal Circuit Tackles the Role of Expert Opinions in Patent Damages in EcoFactor Inc. v. Google, LLC

Baker Botts L.L.P. on

The Federal Circuit rarely decides cases en banc. For example, in 2024, the Court only heard one en banc case. Stunningly, on September 25, 2024, the Federal Circuit granted Google’s petition for rehearing en banc in the case...more

Knobbe Martens

New Trial Granted Because “Nearly All” of the Defendant’s Noninfringement Evidence Was Untimely

Knobbe Martens on

The district court erred by admitting untimely expert testimony on noninfringement and by refusing to grant a new trial after the jury found noninfringement. Trudell Medical International (“Trudell”) sued D R Burton...more

McDermott Will & Schulte

Judicial Bias and Erroneous Admission of Expert Testimony Prompt Case Reassignment

The US Court of Appeals for the Federal Circuit reversed a district court’s decision to admit expert testimony and remanded the case to a different judge, noting that “from the moment this case fell in his lap, the trial...more

Montgomery McCracken

Recent Third Circuit Opinion Reinforces That Daubert Requires Courts to Examine the Data Underlying an Expert’s Analysis

Montgomery McCracken on

February 11, 2025 Types : Alerts Meta Platforms, Inc. recently defeated certification of a class of consumers who claim the company lied about its user privacy safeguards and violated antitrust laws. ...more

Knobbe Martens

Reversal on Reverse Doctrine of Equivalents

Knobbe Martens on

Conflicting expert testimony constituted substantial evidence supporting the jury’s rejection of a reverse doctrine of equivalents argument....more

Blank Rome LLP

New Jersey Appellate Division Makes Clear Experts Must Demonstrate a Scientifically Recognized Methodology

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Recently, the New Jersey Appellate Division, in Dorrell v. Woodruff Energy, Inc., vacated a 2018 judgment against Chevron U.S.A., Inc. (“Chevron”) that had found Chevron liable for gasoline contamination. More specifically,...more

Irwin IP LLP

Federal Circuit Opts Not to Play its REVERSE [DOE] Card 

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Steuben Foods, Inc. v. Shibuya Hoppmann Corp., No. 23-1790 (Fed. Cir. 2025) - On January 24, 2025, the Federal Circuit considered the “long mentioned but rarely applied” reverse doctrine of equivalents (“RDOE”) defense. ...more

Fox Rothschild LLP

Decision to Forgo Interview of Special Needs Child in Custody Determination Affirmed

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Under the New Jersey Court Rules, a trial judge presiding over a custody hearing is free to conduct an in-camera interview with the children whose custody is at issue, whether on the judge’s own accord or upon a party’s...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

Marshall Dennehey

Key New Jersey Appellate Win Secured in Legal Malpractice Action

Marshall Dennehey on

A decision impacting the defense of such actions from damages claims by new businesses - In an Appellate decision impacting the defense of legal malpractice actions arising out of claims for damages by new businesses, Jack...more

McDermott Will & Schulte

Bottling the Truth: Equivalence and Reverse Equivalence

The US Court of Appeals for the Federal Circuit ruled that the “substantially the same way” comparison in connection with a doctrine of equivalents (DOE) analysis involving a means-plus-function claim limitation should focus...more

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