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Federal Circuit Reverses Equitable Estoppel Defense: Reliance Requires More Than Business Pragmatism

Summary by patentlyo.com
by Dennis Crouch Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. v. Sirius XM Radio Inc., 2023-2267 (Fed. Cir. June 9, 2025) In this infringement case, Judge Bataillon (D.Del) sided with the accused infringer on summary judgment -- finding that Fraunhofer's infringement claim was barred by equitable estoppel. The Federal Circuit reversed on appeal - finding genuine disputes of material fact on the key estoppel issue of detri…
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patentlyo.com broke the news in on Saturday, June 14, 2025.
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