Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4709862 | Method of reclaiming green sand | — | 1987-12-01 |
| 4681267 | Method of regenerating old casting sand | Hubert Eirich, Paul Eirich, Walter Eirich | 1987-07-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4709862 | Method of reclaiming green sand | — | 1987-12-01 |
| 4681267 | Method of regenerating old casting sand | Hubert Eirich, Paul Eirich, Walter Eirich | 1987-07-21 |