US PATENT SUBCLASS 248 / 618
.~ Including spring zone understructure

Current as of: June, 1999
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248 /   HD   SUPPORTS

560  DF  RESILIENT SUPPORT {16}
618.~ Including spring zone understructure {9}
619  DF  .~.~> Diverse resilient elements {2}
622  DF  .~.~> Resilient vertical standard {1}
624  DF  .~.~> Spiral spring {1}
626  DF  .~.~> Elliptic spring {1}
628  DF  .~.~> C-section
629  DF  .~.~> Cantilever
630  DF  .~.~> Laminated spring
631  DF  .~.~> Fluid spring
632  DF  .~.~> Nonmetallic resilient element {1}

DEFINITION

Classification: 248/618

Including spring zone understructure:

(under subclass 560) Structure comprising a portion or section of supporting understructure which consists entirely of springs or resilient material.