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.

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

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

009 — Class 9 consists mostly of instruments used for controlling vehicles (such as ships), scientific research, and all computer programs and software regardless of the recording media such as CD-ROMs, hard drives, downloads, etc.

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.

012 — Class 12 includes apparatus for locomotion by land, air, or water including motors, engines, couplings, and transmission components.

015 — Class 15 includes mechanical pianos, music boxes, and electronic muical instruments.

008 — Class 8 includes mainly hand-operated implements used as tools in the respective professions.