US PATENT SUBCLASS 5 / 253
.~.~.~.~ With accessory spring shock absorbers

Current as of: June, 1999
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5 /   HD   BEDS

131  DF  BEDSTEADS {6}
400  DF  .~ Having bottom {9}
246  DF  .~.~ Of springs {3}
248  DF  .~.~.~ Spiral springs only {3}
253.~.~.~.~ With accessory spring shock absorbers

DEFINITION

Classification: 5/253

(under subclass 248) Devices comprising additional resilient members in a spring assemblage called into play in event of unusual depression, or special arrangements by which the ordinarily latent resilience of certain regions is called upon to withstand heavy shock.