US PATENT SUBCLASS 297 / 423.45
.~.~.~.~ Rectilinearly in vertical direction

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

423.1  DF  REST FOR KNEE, LEG, OR FOOT {6}
423.39  DF  .~ Portable {2}
423.41  DF  .~.~ Self-supported {3}
423.44  DF  .~.~.~ Adjustable to plural operative positions {2}
423.45.~.~.~.~ Rectilinearly in vertical direction

DEFINITION

Classification: 297/423.45

Rectilinearly in vertical direction:

(under subclass 423.44) Device in which the adjustment means is configured to permit the rest to move along a straight line which extends substantially perpendicular to a horizontal plane.