A state appeals court said Tuesday that the 49ers may pat down fans before they enter Monster Park. Two season-ticket holders sued the team for invasion of privacy in 2005 after the 49ers instituted the policy that season as part of the NFL's anti-terrorism security efforts. The California Court of Appeal, in a 2-1 decision, said that Daniel and Kathleen Sheehan waived their privacy concerns because they knew of the pat-down searches before they bought their tickets for the 2006-07 season. They sued in December 2005 after experiencing pat-down searches that season.