| 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} |
| 344.22 | DF | .~.~.~ Including means to lock unit at distinct rotated positions {1} |
| 344.23 | | .~.~.~.~ Motor actuated |