US PATENT SUBCLASS 297 / 263.2
.~.~.~ Having anti-friction means to facilitate rotation

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

258.1  DF  ROCKER-MOUNTED {7}
261.1  DF  .~ Track-mounted rocker (e.g., platform rocker) {6}
263.1  DF  .~.~ Rotatable about vertical axis to reorientate chair {1}
263.2.~.~.~ Having anti-friction means to facilitate rotation

DEFINITION

Classification: 297/263.2

Having anti-friction means to facilitate rotation:

(under subclass 263.1) Device provided with roller means (e.g., roller, ball bearing) disposed between the track and the base of the chair to facilitate the rotation of the track upon the base.