Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8075023 | Coupling for drilling-with-casing operations | Eugene J. Mannella | 2011-12-13 |
| 7347459 | Coupling for drilling-with-casing operations | Eugene J. Mannella | 2008-03-25 |
| 5015017 | Threaded tubular coupling | — | 1991-05-14 |
| 4846507 | Casing connector | — | 1989-07-11 |