| 1/00 | Burners for combustion of pulverulent fuel (arrangement or mounting of burners F23C 5/00) |
| 1/02 | Burners for combustion of pulverulent fuel (arrangement or mounting of burners F23C 5/00) Vortex burners, e.g. for cyclone-type combustion apparatus |
| 1/04 | Burners for combustion of pulverulent fuel (arrangement or mounting of burners F23C 5/00) Burners producing cylindrical flames without centrifugal action |
| 1/06 | Burners for combustion of pulverulent fuel (arrangement or mounting of burners F23C 5/00) Burners producing sheet flames |
| 3/00 | Burners using capillary action |
| 3/02 | Burners using capillary action Wick burners |
| 3/04 | Burners using capillary action Wick burners with flame spreaders (F23D 3/12 takes precedence) |
| 3/06 | Burners using capillary action Wick burners Inverted wick burners, e.g. for illumination |
| 3/08 | Burners using capillary action Wick burners characterised by shape, construction, or material, of wick |
| 3/10 | Burners using capillary action Wick burners Blue-flame burners |
| 3/12 | Burners using capillary action Wick burners Blue-flame burners with flame spreaders |
| 3/14 | Burners using capillary action Wick burners Blue-flame burners with mixing of air and fuel vapour in a chamber before the flame |
| 3/16 | Burners using capillary action Wick burners using candles (candles per seC11C) |
| 3/18 | Burners using capillary action Wick burners Details of wick burners |
| 3/20 | Burners using capillary action Wick burners Details of wick burners Flame spreaders |
| 3/22 | Burners using capillary action Wick burners Details of wick burners Devices for mixing evaporated fuel with air |
| 3/24 | Burners using capillary action Wick burners Details of wick burners Carriers for wicks |
| 3/26 | Burners using capillary action Wick burners Details of wick burners Carriers for wicks Safety devices thereon |
| 3/28 | Burners using capillary action Wick burners Details of wick burners Wick-adjusting devices |
| 3/30 | Burners using capillary action Wick burners Details of wick burners Wick-adjusting devices directly engaging with the wick |