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==Patente==
 
==Patente==
 
*[https://patents.google.com/patent/US9912031B2/en US 9912031 B2]
 
*[https://patents.google.com/patent/US9912031B2/en US 9912031 B2]
 +
*[https://patents.google.com/patent/US7969042 US 7969042]
    
==Weblinks==
 
==Weblinks==
81.394

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