A trial team from Wilson Sonsini Goodrich & Rosati delivered a $1 billion save for client Amphastar Pharmaceuticals Inc. after a federal jury in Boston on Friday sided with the company in a patent fight over its generic version of the blood-thinner Lovenox.

Wilson Sonsini partners Michael Sommer and Doug Carsten led Amphastar’s team, squaring off against Momenta Pharmaceuticals Inc., represented by Choate, Hall & Stewart, and Novartis AG’s Sandoz unit, represented by Morrison & Foerster.