Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4358085 | Keying means for segmented end ring blowout preventer | John Regan | 1982-11-09 |
| 4333526 | Annulus valve | — | 1982-06-08 |
| 4326328 | Method of releasably connecting a pair of pipes | — | 1982-04-27 |
| 4326584 | Kelly packing and stripper seal protection element | — | 1982-04-27 |