US PATENT SUBCLASS 297 / 103
.~.~ Parallelogram linkage

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

94  DF  BACK REVERSIBLE AS TO BOTTOM; E.G., WALKOVER TYPE {4}
101  DF  .~ Multiple links, pivotally connected to back {2}
103.~.~ Parallelogram linkage

DEFINITION

Classification: 297/103

(under subclass 101) Device wherein the reversing links extend in the same direction, and wherein the distance between the pivot points at which they are connected to the back and the supporting structure is the same.