All three of these options are accurate and acceptable. You can search for pre-approved descriptions of goods or services and their classification in our ID Manual or you can draft your own descriptions for an additional fee per class. There are 45 trademark classes in total, divided into 34 classes for goods and 11 classes for services. After reviewing the ID Manual, if you cannot find an accurate. A unit or assembly of units or sections, and associated fittings, forming a rigid structural system used to support cables and raceways, bus ducts, lighting fixtures, pipeline, water mains, sewage mains; cable and wiring troughs; shelvings, conduits and the like 6 - Common metals and their alloys;. Cable trays support insulated electrical cables in industrial and commercial settings. Each cable tray type performs a different function and comes in various materials such as aluminum. The USPTO uses trademark classes to organize goods and services in applications, assess fees, and compile a searchable database for registered and pending trademarks. Determining how goods and. Cable trays, as the name suggests, are structural systems used to hold and support cables and wires in commercial, industrial, and infrastructure settings. We will discuss various types of.