US PATENT SUBCLASS 297 / 396
.~ Extension of upper back
Current as of:
June, 1999
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297 /
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CHAIRS AND SEATS
391
DF
HEADREST
{12}
396
.~ Extension of upper back
DEFINITION
Classification: 297/396
(under subclass 391) Device wherein the top of the back of the seat is enlarged to provide a distinct headrest area, distinguished (as by different contour or by means which permit it to move relative to the back) from the back proper.