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US7615108 -  Nov 10, 2009 
US20090260602 -  Oct 22, 2009 
US7594500 -  Sep 29, 2009 
US7591252 -  Sep 22, 2009 
US20090194077 -  Aug 06, 2009 
US20090159055 -  Jun 25, 2009 
US7543574 -  Jun 09, 2009 
US7507278 -  Mar 24, 2009 
US7488376 -  Feb 10, 2009 
US7458367 -  Dec 02, 2008