US PATENT SUBCLASS 297 / 402
.~.~.~.~ Screw clamp

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

391  DF  HEADREST {12}
397  DF  .~ Portable, with seat attacher {2}
399  DF  .~.~ U-clamp mounted {1}
400  DF  .~.~.~ Adjustable {2}
402.~.~.~.~ Screw clamp

DEFINITION

Classification: 297/402

(under subclass 400) Device wherein one of the legs of the clamp is movable toward and away from the other by means of a screw and nut device.