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Floor construction with variable grade of resilience

  • US 9,986,863 B2
  • Filed: 02/08/2010
  • Issued: 06/05/2018
  • Est. Priority Date: 02/13/2009
  • Status: Expired due to Fees
First Claim
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1. A floor construction, comprising:

  • a resilient layer with a variable resilience that has a grade and an adapting surface; and

    means for varying the grade of resilience.

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