Description  Claims  Cited references 

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US20090145086A1   [0004] 
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US5461433A   [0044] 
EP1465931A   [0050] 
US6218508B   [0059] 
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US3700623A   [0086] 
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US7384590B   [0101] 
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US20120026457A1   [0102]  [0108]  [0112]  [0116]