006 — Class 6 includes mainly unwrought and partly wrought common metals as well as simple products made of them.

007 — Class 7 includes mainly machines, machine tools, motors and engines.

011 — Class 11 is for lighting, heating, cooking, refrigeration, drying, ventilating, water supply, steam generating, and sanitary purposes. Examples include air conditioning, hot water bottles, bed warmers, blankets for non-medical purposes, and electric kettles.

017 — Class 17 includes mainly electrical, thermal and acoustic insulating materials and plastics, being for use in manufacture in the form of sheets, blocks and rods.

020 — Class 20 includes mainly furniture and its parts and plastic goods, not included in other classes.

021 — Class 21 includes mainly small, hand-operated utensils and apparatus for household and kitchen use as well as toilet utensils, glassware and articles in porcelain.