Chairs and seats

Claim 1

A CHAIR HAVING BODY SUPPORTING SEAT AND BACK PORTIONS, SAID PORTIONS HAVING THREE-DIMENSIONAL CONTOURS AND RELATIVE POSITIONS SUBSTANTIALLY CORRESPONDING TO THE CONTOURS AND POSITIONS DETERMINED FOR A PERSON ASSUMING A PARTICULAR TYPE OF SITTING POSITION, SAID SEAT PORTION POSITION SUBSTANTIALLY CORRESPONDING TO THE SEAT PORTION HEIGHT AND INCLINATION ADJUSTED TO THE COMFORT OF THE SEATED PERSON, SAID BACK PORTION POSITION SUBSTANTIALLY CORRESPONDING TO THE BACK PORTION INCLINATION AND POSITIONING, RELATIVE TO THE SEAT PORTION POSITIONING, ADJUSTED TO THE COMFORT OF THE SEATED PERSON; AND THE SEAT AND BACK PORTION CONTOURS SUBSTANTIALLY CORRESPONDING TO CONTOURS ADJUSTED TO THE COMFORT OF THE SEATED PERSON, WITH THE BACK PORTION HAVING A THREE-DIMENTIONAL CONTOUR SUBSTANTIALLY CORRESPONDING TO THAT FORMED BY THE EXPOSED FORWARD ENDS OF A PLURALITY OF UNBIASED, MUTUALLY INDEPENDENT, CLOSELY SPACED AND FORWARDLY EXTENDING BACK PLUNGERS, MOVABLE TO INDIVIDUALLY ADJUSTED POSITIONS, WHEN SUCH BACK PLUNGERS HAVE BEEN INDIVIDUALLY MANUALLY ADJUSTED TO UNYIELDINGLY AND INDEPENDENTLY ENGAGE AND FIRMLY SUPPORT THE BACK OF THE SEATED PERSON IN A COMFORTABLE POSITION, AND WITH THE SEAT PORTION HAVING A THREEDIMENSIONAL CONTOUR SUBSTANTIALLY CORRESPONDING TO THAT FORMED BY THE UPPER SURFACES OF A PLURALITY OF MUTUALLY INDEPENDENT, CLOSELY SPACED AND VERTICALLY DISPOSED SEAT PLUNGERS WHICH ARE INDEPENDENTLY MOVABLE AND EQUALLY AND INDIVIDUALLY RESILIENTLY URGED UPWARDLY WHEN THE PERSON IS SEATED ON THE EXPOSED UPPER SURFACES OF SAID SEAT PLUNGERS WHILE THE PERSON''S BACK IS FIRMLY SUPPORTED BY SAID BACK PLUNGERS IN THE MANNER DESCRIBED.