US PATENT SUBCLASS 297 / 344.26
.~.~.~ Including antifriction feature (e.g., ball bearings, etc.)

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

311  DF  MOVABLE BOTTOM {5}
344.1  DF  .~ Bottom and back movable as a unit {3}
344.21  DF  .~.~ About vertical axis; i.e., rotates {4}
344.26.~.~.~ Including antifriction feature (e.g., ball bearings, etc.)

DEFINITION

Classification: 297/344.26

Including antifriction feature (e.g., ball bearings, etc.):

(under subclass 344.21) Device including a friction-reducing element made of material having a low coefficient of friction, or which is shaped to facilitate movement of the unit.