Apple and Proview are in a heated legal battle over the ownership of the iPad name in China and now Apple is threatening to sue the Asian company for defamation. Apple is upset with Proview's attempt to reclaim the iPad trademark and use it to ban iPad sales in China. According to PC World, Apple supposedly sent a letter to Proview founder Yang Rongshan which says, "It is inappropriate to release information contrary to the facts to the media, especially when such disclosures have the effect of wrongfully causing damage to Apple's reputation," Apple's letter follows a public press conference by Yang during which he claimed Proview never transferred the trademark to Apple. Yang claims the Taiwan subs