Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6155327 | Counterbalance system adjustment mechanism for rollup door | David M. Wells | 2000-12-05 |
| 5821428 | Sealed observation element for sulfur recovery unit | George W. Taggart, James E. Lewis | 1998-10-13 |