US PATENT SUBCLASS 297 / 309
.~.~ Bottom component resiliently supports back

Current as of: June, 1999
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297 /   HD   CHAIRS AND SEATS

285  DF  BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION {12}
307  DF  .~ Constantly oriented during up-and-down movement {2}
309.~.~ Bottom component resiliently supports back

DEFINITION

Classification: 297/309

(under subclass 307) Device wherein the back is supported by the bottom and received its resilient support therefrom.

SEE OR SEARCH CLASS

248, Supports,

560+, for a resilient support.