Morning Wrap: 7/31/12

Jury chosen in Apple-Samsung patent trial, visible progress at 49ers’ new stadium, mechanical failure ruled out in Six Flags roller coaster incident, more.

• The skeletal beams for the 49ers future home in the South Bay have begun popping into view in Santa Clara. Mercury News
• Officials at Six Flags Discovery Kingdom in Vallejo ruled out mechanical failure as a cause of a roller coaster with a dozen people aboard stalling 150 feet above the ground on Sunday. AP
• Apple and Samsung completed jury selection in their epic battle over smartphone patent rights. Mercury News
• Four months after her disappearance, family and volunteers keep up the search for missing and presumed dead Morgan Hill teenager Sierra LaMar. Mercury News
• SFFD now says the fire that damaged Pier 29 last month was caused by welders working there. Bay City News Service
• Car-maker Lexus has signed on as a sponsor for the 2013 America’s Cup, which has had a slow-go so far in signing sponsors. San Francisco Business Times
• The Warriors signed free agent power forward Carl Landry to a two-year deal. Mercury News