Maquet Cardiovascular Llc v. Abiomed Inc., decided March 21, 2025

Maquet appealed a district court judgment of non-infringement concerning claims in its U.S. Patent No. 10,238,783 related to intravascular blood pump systems. The appellate court reviewed the district court's claim construction of terms like "guide mechanism comprising a lumen" and "guide wire," finding errors in the application of prosecution disclaimer. As a result, the Federal Circuit vacated the lower court's judgment on the '783 patent and remanded the case for further proceedings based on a corrected understanding of the claim language. The judgment of non-infringement concerning U.S. Patent No. 9,789,238 was left undisturbed as it was not part of the appeal.