US PATENT SUBCLASS 248 / 576
.~.~ Plural springs

Current as of: June, 1999
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248 /   HD   SUPPORTS

560  DF  RESILIENT SUPPORT {16}
575  DF  .~ Adjustable preloading of resilient means {2}
576.~.~ Plural springs {1}
577  DF  .~.~.~> Adjusting rod between and parallel to coil spring axes

DEFINITION

Classification: 248/576

Plural springs:

(under subclass 575) Structure comprising a plurality of adjustable springs.