| F | SK | MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING |
| F21 | USK | LIGHTING; HEATING |
| F21 | KL | LIGHTING |
| F21H | UKL | INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION |
| F21H 1/00 | HGR | Incandescent mantles; Selection of imbibition liquids therefor [1, 2006.01] |
| F21H 1/02 | UGR1 | | . | characterised by the material thereof [1, 2006.01] |
|
| F21H 3/00 | HGR | Manufacturing incandescent mantles; Treatment prior to use, e.g. burning-off; Machines for manufacturing [1, 2006.01] |
| F21H 5/00 | HGR | Solid incandescent bodies (incandescent mantles F21H 1/00) [1, 2006.01] |
| F21H 7/00 | HGR | Other incandescent bodies [2009.01] |