US PATENT SUBCLASS 297 / 168
.~.~.~ Vertically adjustable

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

135  DF  WITH TABLE, DESK, OR EASEL {13}
163  DF  .~ Table behind seat {2}
167  DF  .~.~ Tiltable seat {2}
168.~.~.~ Vertically adjustable

DEFINITION

Classification: 297/168

(under subclass 167) Device in which the seat is additionally adjustable perpendicularly.