Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5012875 | Method and apparatus for protecting a shallow-water well | Kenneth M. Dewalt | 1991-05-07 |
| 4740107 | Method and apparatus for protecting a shallow-water well | Kenneth M. Dewalt | 1988-04-26 |