The U.S. Supreme Court ruled against Microsoft Corp (MSFT.O) on Thursday in its appeal of a record $290 million jury verdict for infringing a small Canadian software firm's patent.

The justices unanimously upheld a U.S. appeals court's ruling that went against the world's largest software company in its legal battle with Toronto-based i4i.

Read the complete Reuters story, “Microsoft loses U.S. top court case on patent.”