Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4547417 | Core plug | David Alan Hopkins, Dennis I. Deegan | 1985-10-15 |
| 4484715 | Core plug | David Alan Hopkins, Dennis I. Deegan | 1984-11-27 |
| 4460087 | Core plug | David Alan Hopkins, Walter D. McVicar | 1984-07-17 |