Description  Claims  Drawing  Cited references 

US5338198A   [0007] 
US5851115A   [0008] 
US5652709A   [0009] 
US6283753B1   [0011] 
USRE36126E   [0071] 
USRE36689E   [0071] 
US6050821A   [0077] 
US6638219B   [0077]