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DE10256984B4   [0003] 
DE102005004682A1   [0003] 
DE102006060468B3   [0003] 
US4495239A   [0004] 
DE1227090A   [0004] 
DE8813680U1   [0004] 
DE102004025647A1   [0004] 
JP2002068082A   [0004] 
US3349397A   [0005] 
US6444595B1   [0006] 
US2003220041A1   [0006] 
US3047860A   [0007] 
US5077556A   [0008] 
US5164242A   [0009] 
WO2007142125A1   [0010] 
US20120147582A1   [0011] 
US5436630A   [0012] 
DE8910698U1   [0013] 
US2014008118A1   [0014]