Description  Claims  Drawing  Cited references 

US3746152A   [0003] 
US6112936A   [0004] 
US6488175B   [0005] 
US6886714B   [0006] 
US20070210096A1   [0007] 
US5992683A   [0008] 
US4153412A   [0035] 
US8646653B   [0035]