Description  Claims  Cited references 

US01647311A   [0021] 
US13767672B   [0021] 
US8344006B   [0022] 
US8076366B   [0022] 
US20130041004A   [0022] 
US20120071532A   [0022] 
US20100216858A   [0022] 
US20060159713A   [0022] 
US20130041003A   [0022]