Sectional furniture, i.e. combinations of complete furniture units; , e.g. assemblies of furniture units of the same kind such as linkable cabinets, tables, racks or shelf units
Stackable frames, or frame elements, with upright parts connected by inserting the ends or tips of the uprights, e.g. at the corners, into the uprights of the next frame or frame element, e.g. coaxial tubular ends
