US PATENT SUBCLASS 108 / 133
.~.~.~ Spring biased

Current as of: June, 1999
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108 /   HD   HORIZONTALLY SUPPORTED PLANAR SURFACES

115  DF  FOLDING {9}
129  DF  .~ Legs fold axially parallel to surface edges {2}
131  DF  .~.~ Releasable means holds paired legs in predetermined position {2}
133.~.~.~ Spring biased

DEFINITION

Classification: 108/133

(under subclass 131) Device in which the means is a spring, or is spring actuated.