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Expert Witness Blog

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Federal Circuit Affirms Damages After Daubert Challenge to Marketing Expert Witness in Patent Dispute

In the recent case of Dynamite Marketing, Inc. v. The WowLine, Inc., No. 24-1523 (Fed. Cir. 2025), the United States Court of Appeals for the Federal Circuit addressed the admissibility and impact of testimony from a Marketing Expert Witness in a complex patent infringement litigation. The case provides a clear…

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Products Liability Expert Witness Case Summary

In the case of In re: Paraquat Products Liability Litigation, MDL No. 3004 (S.D. Ill. 2024), the United States District Court for the Southern District of Illinois addressed the admissibility of expert testimony in a multidistrict litigation (MDL) concerning allegations that exposure to the herbicide paraquat caused plaintiffs to develop…

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Tree/Arborist Expert Witness Case Summary

In the case of Everson v. Nautilus Insurance Co., No. 2:23-cv-1360 (E.D. La. Sept. 16, 2024), the United States District Court for the Eastern District of Louisiana addressed the admissibility of expert testimony in a negligence lawsuit involving a tree-cutting incident. The involvement of a Tree/Arborist Expert Witness was central…

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Ladders and Scaffolds Expert Witness Case Summary

In the case of Lehmann v. Louisville Ladder Inc., 610 F. Supp. 3d 667 (E.D. Pa. 2022), the United States District Court for the Eastern District of Pennsylvania addressed critical issues concerning product liability and the admissibility of expert testimony in a lawsuit stemming from a scaffold-related injury. The involvement…

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Personal Injury Expert Witness Case Summary

In the landmark case of Jones v. Kaney, [2011] UKSC 13, the United Kingdom Supreme Court addressed the issue of whether expert witnesses could be held liable for professional negligence in relation to their participation in legal proceedings. This case significantly impacted the legal landscape concerning the accountability of expert…

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