Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5172748 | Device for the batch-wise preparation of loose material | — | 1992-12-22 |
| 5115985 | Method for the regenerative treatment of mainly clay-bound foundry old sand | Ludwig Wilhelm | 1992-05-26 |
| 5103894 | Process for the treatment of clay-bonded used casting sand | Ludwig Wilhelm | 1992-04-14 |
| 5034035 | Device for preparing bulk material with a dust removal arrangement | Ernst Trondle | 1991-07-23 |
| 4274360 | Apparatus for regenerating used foundry sand | Franz Hofmann | 1981-06-23 |