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US20070112422   [0030]  [0056] 
US280063A   [0030] 
US20100049313A   [0030] 
US429040   [0030] 
US6730118B   [0030]  [0030]  [0065]  [0083] 
US20070005131   [0044]  [0070]  [0075] 
US152288   [0044]  [0070]  [0075] 
US280063   [0056] 
US6893460B   [0065] 
US20080065011   [0070]  [0075] 
US852977   [0070]  [0075] 
US6878162B   [0087] 
US910975   [0118] 
US20130331930A   [0118] 
US938071   [0118] 
US20140031864A   [0118] 
US61729109   [0199] 
WO2014081796A   [0199]