Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4508311 | Annular blowout preventer | Bolie C. Williams, III | 1985-04-02 |
| 4313496 | Wellhead shearing apparatus | Eric G. Childs | 1982-02-02 |
| 4215747 | Blowout preventer with tubing aligning apparatus | Fern H. Cox, William M. Taylor | 1980-08-05 |