The billion dollar patent fight between the world's two biggest smartphone makers is resuming in a Silicon Valley courtroom. Lawyers for rivals Apple Inc. and South Korea-based Samsung Electronics Co. were scheduled to deliver opening statements Wednesday in a San Jose courtroom in a trial to determine how much Samsung owes Apple for copying vital iPhone and iPad features. A previous jury awarded Apple $1.05 billion after determining 26 Samsung products had infringed six Apple patents. But a judge found the jury miscalculated $400 million in damages for 13 products and ordered a new trial to determine the proper amount. The new jury is free to order new damages ranging from nothing to more than the original $400 million. "Most cases with these enormous stakes would have settled by now - particularly once the court ordered a new trial on damages, which could substantially increase or decrease the damage award," said Notre Dame law school professor Mark McKenna, who specializes in technology.