Trademark Class 6: Metal Building Materials & Hardware

The class's top filers — Greenberg Traurig, Muncy Geissler Olds & Lowe, and Merchant & Gould — are prominent IP firms representing manufacturers across the metals and construction products sectors. The breadth of Class 6 ranges from massive steel producers branding structural beams to small hardware companies protecting marks on fasteners, hinges, and fittings. Metal containers for storage and transport, including shipping containers and industrial drums, also fall within this class and represent a growing filing segment.

The defining classification challenge in Class 6 is the metal versus non-metal divide with Class 19. Steel beams are Class 6; concrete beams are Class 19. Metal pipes are Class 6; plastic pipes are Class 19. This material-based distinction is straightforward in principle but creates complications for companies that manufacture both metal and non-metal variants of the same product, often requiring filings in both classes. Another frequent pitfall involves the boundary with Class 20: finished metal furniture belongs in Class 20, not Class 6, because Nice Classification groups furniture by function rather than material. Precious metals are excluded entirely — they fall under Class 14 regardless of their form.

Construction and building materials brands typically file across Classes 6, 19, and 37, covering metal materials, non-metal materials, and construction services. Hardware manufacturers often pair Class 6 with Class 7 for power tools and Class 8 for hand tools. Companies producing metal storage solutions should consider adding Class 20 for non-metal containers and Class 39 for storage services to complete their portfolio coverage.