>  MP> Any item produced with a 3D printer could, in theory, carry this  
  >  MP> invisible signature.  
    
  >  the problem is it could be replicated, and in mass to pervert it for  
  either  
  > effective use for identification, or to cause false guilty verdicts  
    
  Yeah, not sure how they think they could make that work effectively.  
    
  Mike  
    
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