Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834706 | Process for recovering sand and bentonite clay used in a foundry | Robert C. Steele | 2004-12-28 |
| 6554049 | Process for recovering sand and bentonite clay used in a foundry | Robert C. Steele | 2003-04-29 |