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US43931703P   [0001]  [0001] 
US46334703P   [0001]  [0001] 
US95730201A   [0007] 
US6319332A   [0008] 
US6571417B   [0008]  [0013] 
US6126533A   [0009] 
US45428103A   [0010]  [0020]  [0026] 
US6319332B   [0013] 
US09957302B   [0046]