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Intellectual Property Protection Doctrine of Equivalents CAFC

Cooley LLP

Federal Circuit Strengthens Prosecution History Estoppel Principles in Colibri Heart Valve LLC v. Medtronic CoreValve, LLC

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On July 18, 2025, the US Court of Appeals for the Federal Circuit reversed a lower court ruling in Colibri Heart Valve LLC v. Medtronic CoreValve, LLC, holding that prosecution history estoppel barred the patentees’ doctrine...more

Proskauer - The Patent Playbook

A Reminder of Doctrine of Equivalents in Biotechnology: Jennewein Biotechnologie GmbH v. International Trade Commission

Doctrine of equivalents (DOE) can be applied as a mechanism to hold a party liable for patent infringement even if the product or process does not literally infringe a patent claim, if the difference is “insubstantial”....more

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