| 1/00 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) |
| 1/02 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type |
| 1/04 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beater rolls or bars |
| 1/06 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Bed plates |
| 1/08 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with means for driving the pulp quickly |
| 1/10 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with means for regulating the pressure between the beater roll and the bed plate |
| 1/12 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with means for continuous pulp discharge |
| 1/14 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with one beater roll and with vertical stuff circulation canal |
| 1/16 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with means for returning the pulp over the head of the beater roll |
| 1/18 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of beating; Beaters of the Hollander type Beaters with two or more beater rolls |
| 1/20 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining |
| 1/22 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Jordans |
| 1/24 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Jordans Jordan rolls |
| 1/26 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Jordans Jordan bed plates |
| 1/28 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Ball or rod mills |
| 1/30 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Disc mills |
| 1/32 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Hammer mills |
| 1/34 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Other mills or refiners |
| 1/36 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Other mills or refiners with vertical shaft |
| 1/38 | Methods of beating or refining; Beaters of the Hollander type (knotter screens D21F) Methods of refining Other mills or refiners with horizontal shaft |