Description  Claims  Drawing  Cited references 

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US4021393A   [0002] 
US4069182A   [0002] 
US6346561B   [0002]  [0009] 
WO2012131605A   [0002]  [0009] 
US20100056669A   [0002] 
US20110233105A   [0002] 
US8182726B   [0002] 
WO2013132488A   [0002]  [0010] 
US20130116364A   [0002] 
US20150080505A   [0002] 
PT108707   [0002]