Description  Claims  Cited references 

US7642282B2   [0004] 
US5576282A   [0045]  [0068] 
US6306812B1   [0045] 
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US2220099A   [0048] 
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US6020303A   [0051]  [0051]  [0056] 
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WO9905243A   [0051] 
WO9905242A   [0051] 
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US3929678A   [0059]  [0060] 
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EP91202655A   [0070] 
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US20040204337A1   [0078]  [0081] 
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US5516448A   [0088] 
US5489392A   [0088] 
US5486303A   [0088] 
US5574179A   [0135]