US PATENT SUBCLASS 297 / 452.54
.~.~.~ Spring integral with frame of bottom or back

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

452.1  DF  BOTTOM OR BACK {12}
452.48  DF  .~ Cushioned {3}
452.49  DF  .~.~ Including a support spring {3}
452.54.~.~.~ Spring integral with frame of bottom or back

DEFINITION

Classification: 297/452.54

Spring integral with frame of bottom or back:

(under subclass 452.49) Device in which the resilient spring element and a supporting frame of the bottom or back are made of one-piece construction (e.g., a spring and a frame integrally formed of molded plastic, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

452.15, for a one-piece plastic bottom and back panel having slits or grooves to enhance the resiliency.