US PATENT SUBCLASS 248 / 631
.~.~ Fluid spring

Current as of: June, 1999
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248 /   HD   SUPPORTS

560  DF  RESILIENT SUPPORT {16}
618  DF  .~ Including spring zone understructure {9}
631.~.~ Fluid spring

DEFINITION

Classification: 248/631

Fluid spring:

(under subclass 618) Structure wherein the resilient material comprises an elastic fluid.