9619 ⎘
Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats; Chairs or stools with vertically-adjustable seats with vertical, toothed rack with rack-and-pinion gearing
PORTABLE FOLDING SEAT WITH CUSHION ATTACHMENT
Seating furniture chassis having a height-adjustment seat surface
Adjusting drive for an adjustable part of a piece of furniture