Description  Claims  Drawing  Cited references 

US4717406A   [0005]  [0006] 
US5685172A   [0005]  [0007] 
US7501009B   [0005]  [0008] 
US5601634A   [0005]  [0009] 
US8480860B   [0011] 
US7234691B   [0011] 
US6250106B   [0011] 
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US6023945A   [0011] 
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US19200314   [0047]