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US20140321184A1   [0005]  [0005]  [0005] 
EP2749373A1   [0006] 
US7978040B2   [0006]  [0008]  [0027] 
US6369680B1   [0007] 
EP3232453A1   [0008]  [0008]  [0010]  [0039]