6, 7, 16, 21
(Metal goods) Common metals and their alloys; metal building materials; transportable buildings of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; iron mongery, small items of metal hardware; pipes and tubes of metal; safes; goods of common metal not included in other classes; ores.Class 7:
(Machinery) Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.Class 16:
(Paper goods and printed matter) Paper, cardboard and goods made from these materials, not included in other classes; printed matter; bookbinding material; photographs; stationery; adhesives for stationery or household purposes; artists" materials; paint brushes; typewriters and office requisites (except furniture); instructional and teaching material (except apparatus); plastic materials for packaging (not included in other classes); playing cards; printers" type; printing blocks.Class 21:
(Housewares and glass) Household or kitchen utensils and containers (not of precious metal or coated therewith); combs and sponges; brushes (except paint brushes); brush-making materials; articles for cleaning purposes; steel wool; un-worked or semi-worked glass (except glass used in building); glassware, porcelain and earthenware not included in other classes.