US PATENT SUBCLASS 297 / 354.11
.~.~ Pivot axis located at or adjacent to a central point of back


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

353  DF  MOVABLE BACK {2}
354.1  DF  .~ Tiltable {3}
354.11.~.~ Pivot axis located at or adjacent to a central point of back


DEFINITION

Classification: 297/354.11

Pivot axis located at or adjacent to a central point of back:

(under subclass 354.1) Device wherein the pivot axis is coincident with or adjacent to a substantially horizontal axis passing through a point located at or near a midpoint of the back.

SEE OR SEARCH THIS CLASS, SUBCLASS:

291, for a centrally-pivoted backrest with a spring.