Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7191896 | Spiral accumulator apparatus | Thomas P. Hartness, Robert C. Beesley | 2007-03-20 |
| 7032742 | Differential drive spiral accumulator apparatus | Thomas P. Hartness, Robert C. Beesley | 2006-04-25 |