US PATENT SUBCLASS 297 / 338
.~.~ Vertically

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

311  DF  MOVABLE BOTTOM {5}
337  DF  .~ Movable independently of back {1}
338.~.~ Vertically {1}
339  DF  .~.~.~> With force-multiplying means

DEFINITION

Classification: 297/338

(under subclass 337) Device wherein the movement of the bottom is in a direction upwardly or downwardly from a horizontal plane.

SEE OR SEARCH THIS CLASS, SUBCLASS:

344.12+, for a bottom and back movable vertically as a unit,

and see the search notes thereto for other fields of search of vertically adjustable seating devices.