This Federal Circuit opinion details an appeal by Maquet Cardiovascular against a district court's judgment that Abiomed did not infringe Maquet's U.S. Patent No. 10,238,783, which concerns intravascular blood pump systems. The appeal specifically challenges the lower court's interpretation of certain terms within the patent claims, arguing that the district court improperly applied prosecution disclaimer to narrow their meaning. The appellate court agreed with Maquet, finding errors in the district court's claim constructions regarding the "guide mechanism" and "guide wire" limitations. As a result, the Federal Circuit vacated the judgment of non-infringement for the '783 patent and remanded the case for further proceedings consistent with their claim interpretations, while leaving the non-infringement ruling for a related '238 patent undisturbed as it was not part of the appeal.
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