Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5456321 | Tubing hanger incorporating a seal | Gordon Shiach, Greg Glidden | 1995-10-10 |
| 5013187 | Positioning components and energizing sealing assemblies therefor | Frank Close, Sean McAvoy | 1991-05-07 |
| 4957313 | Emergency suspension system for drill casings | Sean McAvoy, Frank Close | 1990-09-18 |
| 4951972 | Rotatable sealing assemblies | Frank Close, Sean McAvoy | 1990-08-28 |