| Patents for D21B 1 - Fibrous raw materials or their mechanical treatment (6,805) | |
|---|---|
| 03/1976 | |
| 03/09/1976 | US3942729 Device for supplying treatment agent to ligno-cellulose containing material |
| 03/09/1976 | US3942728 Stock pulper |
| 03/02/1976 | US3941316 Cellulosic material |
| 02/1976 | |
| 02/17/1976 | US3938746 Pre-tearing device for dry plates of wood pulp |
| 01/1976 | |
| 01/20/1976 | US3933577 Process of sonically treating municipal waste to produce high quality paper pulp and fertilizer |