without additional connecting means between the springs

Industry

  • CPC
  • A47C25/02
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Patents Grantslast 30 patents

  • Information Patent Grant

    Spring mattress structure

    • Patent number 8,984,689
    • Issue date Mar 24, 2015
    • Han-Chung Hsu
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...

Patents Applicationslast 30 patents