Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8448298 | Handle attachment for doorknobs | — | 2013-05-28 |
| 5165888 | Gravity flow thermal process for reclaiming foundry sand | James Donahue | 1992-11-24 |
| 5110288 | Gravity flow thermal process for reclaiming foundry sand | James Donahue | 1992-05-05 |