Patent ID: 11900907
Assignee: HOBBS BONDED FIBERS NA, LLC
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC G  B  D | IPC B  D  G

Claim 18:
19. The acoustic insulation of claim 17, wherein the density of the second region is within the range of, 225
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    grams
    
      m
      2
    
  
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  to
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  375
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      grams
      
        m
        2
      
    
    .