Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8579624 | Systems and methods for making multi-wall corrugated pipe | Gerald S. Sutton, David J. Kelley | 2013-11-12 |
| 8550807 | In-mold punch apparatus and methods | — | 2013-10-08 |
| 7988438 | Extrusion die vacuum seals | Gerald S. Sutton, William V. Shaffer | 2011-08-02 |
| 7980841 | Defined ratio dual-wall pipe die | Gerald S. Sutton | 2011-07-19 |