Description  Claims  Drawing  Cited references 

US4183156A   [0003]  [0060] 
US4219945A   [0003]  [0060] 
EP0884006A2   [0005] 
US20050268490A1   [0005] 
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US6082025A   [0060] 
US6127026A   [0060] 
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US6203868B   [0060] 
US6321465B   [0060] 
US4340626A   [0061]