A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
A47C—CHAIRS; SOFAS; BEDS
A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
A47C3/12—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats with shell-shaped seat and back-rest unit, e.g. having arm-rests