Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5421462 | Arrangement for dry reconditioning of used foundry sands | Hermann Hofbauer, Erich Muller, Erhard Putzig | 1995-06-06 |
| 5233765 | Process for the regeneration of used foundry sands | — | 1993-08-10 |