US PATENT SUBCLASS 297 / 296
.~ Back secured to resilient upright bar or rod

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

285  DF  BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION {12}
296.~ Back secured to resilient upright bar or rod {2}
297  DF  .~.~> Bar or rod rigidly secured to bottom
298  DF  .~.~> Bar or rod operatively adjustable with respect to bottom

DEFINITION

Classification: 297/296

(under subclass 285) Device wherein the springy back support comprises a flexible, generally vertical lever having a transverse elastic quality.