Abiomed Preserves Invalidity Bid in Heart-Pump Patent Lawsuit

Abiomed Inc. kept alive its bid to invalidate Maquet Cardiovascular LLC’s heart-pump patent after a Massachusetts federal judge declined to dismiss its written-description and enablement defenses.

Judge F. Dennis Saylor IV, in a mixed ruling issued May 1 in the US District Court for the District of Massachusetts, also barred Abiomed from pursuing separate indefiniteness challenges to two claim terms in US Patent No. 10,238,783.

Abiomed presented enough evidence for a jury to decide whether the patent’s disclosure of cable-driven intravascular blood pumps adequately supports broader claims that could reach pumps with different drive systems, such as the internally ...