IPC Classification
- All sections
- D - Textiles; paper
- D21G - Calenders; accessories for paper-making machines
| D21G 1/00 | Calenders; Smoothing apparatus |
| D21G 1/02 | Rolls; Their bearings |
| D21G 3/00 | Doctors |
| D21G 3/02 | Doctors for calenders |
| D21G 3/04 | Doctors for drying cylinders |
| D21G 5/00 | Safety devices |
| D21G 7/00 | Damping devices |
| D21G 9/00 | Other accessories for paper-making machines |