US PATENT SUBCLASS 297 / 300.5
.~.~.~ Coil spring

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

285  DF  BACK MOVEMENT RESILIENTLY OPPOSED IN OPERATING POSITION {12}
300.1  DF  .~ Back and seat adjust simultaneously {1}
300.2  DF  .~.~ Back tilts while seat inclination adjusts {4}
300.5.~.~.~ Coil spring

DEFINITION

Classification: 297/300.5

Coil spring:

(under subclass 300.2) Simultaneously adjusted back and seat where the resilient member is a tight helix, and whereby

movement is countered by compression or expansion.