According to recently unsealed documents from this coming Monday's Apple-versus-Samsung trial, the Cupertino-based company earned gross margins of 49 to 58 percent on US iPhone sales between April 2010 and the end of March 2012. The iPad had much lower margin between October 2010 and the end of March 2012, seeing profits between 23 and 32 percent. Apple has declined to comment on the court filing.