Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291935 | Process for the mechanical cleaning of foundry used sand | — | 1994-03-08 |
| 5289920 | Process for thermically recovering old sands obtained in casting plants and for treating the dusts obtained during circulation of the sand | Walter Stuzmann | 1994-03-01 |