Camping trailers; canopies for trailers; cast ferrous wheels for use on trailers; drawbars for trailers; fifth wheel connectors for road trailers; horse trailers; landing apparatus for truck trailers; landing gear for truck trailers; livestock trailers; load carrying trailers; non-electric couplings for towing trailers; railway bogies for transporting trailers by rail; refrigerated trailers; road trailers; semi-trailers; supports for trailers and caravans (legs and dolly wheels); suspension apparatus for trailers; tarpaulins adapted (shaped) for use with vehicular trailers; tipping apparatus for trailers; tow bars for trailers; trailer axles; trailer chassis for vehicles; trailer couplings for vehicles; trailer hitches for vehicles; trailer supports; trailer tents; trailer trucks; trailers (vehicles); trailers for motor land vehicles; trailers for petrol tankers; trailers for towing boats; trailers for use with trucks; transport trailers; vehicle trailers; windows for trailers; windows made of multiple layer safety glass for trailers