| 1/00 | Retorts |
| 1/02 | Retorts Stationary retorts |
| 1/04 | Retorts Stationary retorts Vertical retorts |
| 1/06 | Retorts Stationary retorts Horizontal retorts |
| 1/08 | Retorts Stationary retorts Inclined retorts |
| 1/10 | Retorts Rotary retorts |
| 3/00 | Coke ovens with vertical chambers |
| 3/02 | Coke ovens with vertical chambers with heat-exchange devices |
| 5/00 | Coke ovens with horizontal chambers |
| 5/02 | Coke ovens with horizontal chambers with vertical heating flues |
| 5/04 | Coke ovens with horizontal chambers with vertical heating flues with cross-over inter-connections |
| 5/06 | Coke ovens with horizontal chambers with horizontal heating flues |
| 5/08 | Coke ovens with horizontal chambers with horizontal and vertical heating flues |
| 5/10 | Coke ovens with horizontal chambers with heat-exchange devices |
| 5/12 | Coke ovens with horizontal chambers with heat-exchange devices with regenerators |
| 5/14 | Coke ovens with horizontal chambers with heat-exchange devices with regenerators situated in the longitudinal direction of the chambers |
| 5/16 | Coke ovens with horizontal chambers with heat-exchange devices with regenerators situated in the longitudinal direction of the chambers with separated flues |
| 5/18 | Coke ovens with horizontal chambers with heat-exchange devices with regenerators situated in the longitudinal direction of the oven battery |
| 5/20 | Coke ovens with horizontal chambers with heat-exchange devices with recuperators |
| 7/00 | Coke ovens with mechanical conveying means for the raw material inside the oven |