003 — Class 3 includes mainly items designed for cleaning, deodorizing, and other sanitary products made primarily for use on or for humans.

004 — Class 4 includes mainly industrial oils and greases, fuels and illuminants.

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

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.

014 — Class 14 includes mainly precious metals, goods in precious metals not included in other classes and, in general jewellery, clocks and watches.

016 — Class 16 includes mainly paper, goods made from that material and office requisites.

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.

024 — Class 24 includes mainly textiles (piece goods) and textile covers for household use.

042 — Class 42 includes mainly services provided by persons, individually or collectively, in relation to the theoretical and practical aspects of complex fields of activities; such services are provided by members of professions such as chemists, physicists, engineers, computer programmers, etc.