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US61278066B   [0001] 
US61339460B   [0001] 
US61339756B   [0001] 
US61401209B   [0001] 
EP2482747A   [0001] 
US357197   [0015]  [0043]  [0062] 
US20060142657A   [0015]  [0043]  [0062] 
US65459109   [0015] 
US64496409   [0019] 
US750807   [0041]  [0052] 
US20080004633A   [0041]  [0052] 
US6322567B   [0056]