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US7615193 -  Nov 10, 2009 
US7611672 -  Nov 03, 2009 
US7608223 -  Oct 27, 2009 
US7604778 -  Oct 20, 2009 
US7601546 -  Oct 13, 2009 
US20090232708 -  Sep 17, 2009 
US7575719 -  Aug 18, 2009