US PATENT SUBCLASS 108 / 18
.~ Support becomes inoperative

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

11  DF  CONVERTIBLE {7}
18.~ Support becomes inoperative {1}
19  DF  .~.~> Alternately usable legs

DEFINITION

Classification: 108/18

(under subclass 11) Device wherein the other structure has the support in an inoperative position.