US PATENT SUBCLASS 267 / 133
.~ Flexural

Current as of: June, 1999
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267 /   HD   SPRING DEVICES

131  DF  SEAT SUPPORT {2}
133.~ Flexural

DEFINITION

Classification: 267/133

(under subclass 131) Spring device which is the sole means for retention of the seat portion above the base portion; and for arcuate, to-and-fro movement of the seat portion about a horizontal axis.