| Class | Class Name |
|---|---|
| 12 | hot air balloons |
| 12 | hub caps |
| 12 | hubs for bicycle wheels |
| 12 | hubs for vehicle wheels |
| 12 | hulls (ships'-) |
| 12 | hydraulic brake pressure regulators for vehicles |
| 12 | hydraulic circuits for vehicles |
| 12 | hydraulic connectors for vehicles |
| 12 | hydraulic control systems for vehicles |
| 12 | hydraulic couplings for land vehicles |
| 12 | hydraulic transmissions for land vehicles |
| 12 | hydroplanes |
| 12 | inclined ways for boats |
| 12 | industrial trucks |
| 12 | infants' carriages |
| 12 | inflatable boats |
| 12 | inner tubes for bicycle tires |
| 12 | inner tubes for bicycle tyres |
| 12 | inner tubes for bicycles |
| 12 | inner tubes for cycles |
| 12 | inner tubes for pneumatic tires |
| 12 | inner tubes for pneumatic tyres |
| 12 | inner tubes for pneumatic tyres |
| 12 | inner tubes for tyres |
| 12 | interior fittings for vehicles |
| 12 | intermediate bearing units for land vehicles |
| 12 | intrusion detectors [to prevent theft of, or from vehicles] |
| 12 | jet engines for land vehicles |
| 12 | kayaks |
| 12 | kick sledges |
| 12 | kickstands for cycles |
| 12 | ladle carriages |
| 12 | ladle cars |
| 12 | land crafts |
| 12 | land motor vehicles |
| 12 | launches |
| 12 | lift trucks |
| 12 | lifting cars |
| 12 | lifts (tailboard-) |
| 12 | light aircraft |
| 12 | light alloy wheels for motor vehicles |
| 12 | locomotives |
| 12 | lorries |
| 12 | lug nuts for vehicle wheels |
| 12 | luggage carriers for vehicles |
| 12 | luggage nets for vehicles |
| 12 | luggage racks for vehicles |
| 12 | luggage trucks |
| 12 | manually operated wheelchairs |
| 12 | marine propellers |
