Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640902 | Nested stack-down casing hanger system for subsea wellheads | Robert B. Baten, Harold Brian Skeels, David Campbell Macfarlane, Russell McBeth, Marcus Smedley | 2003-11-04 |
| 6513596 | Non-intrusive pressure measurement device for subsea well casing annuli | — | 2003-02-04 |
| 5107931 | Temporary abandonment cap and tool | William A. Valka | 1992-04-28 |
| 4900041 | Subsea well casing hanger packoff system | Bob C. Hopkins, Don C. Underwood | 1990-02-13 |
| 4836288 | Casing hanger and packoff running tool | — | 1989-06-06 |
| 4836579 | Subsea casing hanger suspension system | Bob C. Hopkins, Don C. Underwood | 1989-06-06 |