| 1/00 | Manufacturing hats |
| 1/02 | Manufacturing hats Making hat-bats; Bat-forming machines; Conical bat machines; Bat-forming tools (felting in general D04H) |
| 1/04 | Manufacturing hats Blocking; Pressing; Steaming; Stretching |
| 1/06 | Manufacturing hats Manipulation of hat-brims |
| 1/08 | Manufacturing hats Hat-finishing, e.g. polishing, ironing, smoothing, brushing, impregnating, stiffening, decorating |
| 2/00 | Manufacturing helmets by processes not otherwise provided for |
| 3/00 | Appliances for hat-making not provided for in group A42C 1/00, e.g. for making wire forms for hat-frames (sewing-machines for straw hats D05B; sewing-machines for making hat-brims D05B); Apparatus for changing the form or size of finished hats |
| 3/02 | Appliances for hat-making not provided for in group A42C 1/00, e.g. for making wire forms for hat-frames (sewing-machines for straw hats D05B; sewing-machines for making hat-brims D05B); Apparatus for changing the form or size of finished hats Hat-block holders |
| 3/04 | Appliances for hat-making not provided for in group A42C 1/00, e.g. for making wire forms for hat-frames (sewing-machines for straw hats D05B; sewing-machines for making hat-brims D05B); Apparatus for changing the form or size of finished hats Stands for trimming ladies' hats |
| 3/06 | Appliances for hat-making not provided for in group A42C 1/00, e.g. for making wire forms for hat-frames (sewing-machines for straw hats D05B; sewing-machines for making hat-brims D05B); Apparatus for changing the form or size of finished hats Apparatus for measuring hats |
| 5/00 | Fittings or trimmings for hats, e.g. hat-bands (artificial flowers, feathers A41G) |
| 5/02 | Fittings or trimmings for hats, e.g. hat-bands (artificial flowers, feathers A41G) Sweat-bands |
| 5/04 | Fittings or trimmings for hats, e.g. hat-bands (artificial flowers, feathers A41G) Ventilating arrangements for head coverings (for helmets A42B 3/28) |
| 99/00 | Subject matter not provided for in other groups of this subclass |